FINAL EXAM OF SEMESTER II CLASS XI of SENIOR HIGH SCHOOL Multiple choice Indicator : The student can describe the acid-base theories with determine the solution characteristic. (C 1, K 1 ) 1. Based on Arrhenius theory, a substance is classified into base if .... a. It will ionize in water b. It will release H + ion in water c. It will release OH - in water d. It can give protons e. It can accept pair of electrons Indicator : The student can identifying the acid-base theories with determine the reaction. 2. HClO 4 compound can be acidic or basic. Reaction showing HClO 4 as basic is .... a. HClO 4 + NH 2 - ClO 4 - + NH 3 b. HClO 4 + NH 3 ClO 4 - + NH 4 + c. HClO 4 + H 2 O ClO 4 - + H 3 O + d. HClO 4 + OH - ClO 4 - + H 2 O e. HClO 4 + N 2 H 5 + H 2 ClO 4 + N 2 H 4 Indicator : The student can classified the acid-base compound with determine the solution characteristic. 3. Among these acid-base compounds below, which ones are classified into polyprotic acid base? (C 1 , K 2 ) a. NaOH b. Ca(OH) 2 c. H 3 PO 4 d. HCl e. CH 3 COOH Answer : c. H 3 PO 4 (aq) → 3H + (aq) + PO 4 3- (aq)
Transcript
FINAL EXAM OF SEMESTER II CLASS XI of SENIOR HIGH SCHOOL
Multiple choice
Indicator : The student can describe the acid-base theories with determine the solution characteristic. (C1,K1)
1. Based on Arrhenius theory, a substance is classified into base if ....a. It will ionize in waterb. It will release H+ ion in waterc. It will release OH- in waterd. It can give protonse. It can accept pair of electrons
Indicator : The student can identifying the acid-base theories with determine the reaction.
2. HClO4 compound can be acidic or basic. Reaction showing HClO4 as basic is ....
a. HClO4 + NH2- ClO4
- + NH3
b. HClO4 + NH3 ClO4- + NH4
+
c. HClO4 + H2O ClO4- + H3O+
d. HClO4 + OH- ClO4- + H2O
e. HClO4 + N2H5+ H2ClO4 + N2H4
Indicator : The student can classified the acid-base compound with determine the solution characteristic.
3. Among these acid-base compounds below, which ones are classified into polyprotic acid base? (C1, K2)
a. NaOHb. Ca(OH)2
c. H3PO4
d. HCle. CH3COOH
Answer : c. H3PO4 (aq) → 3H+ (aq) + PO4
3-(aq)
Σ ion H+ = 3 (polyprotic ions)
Indicator : The student can identifying the acid-base solution with determine the solution characteristic.
Solution Litmus Color after DippingRed Blue
I √ -II - √III √ -IV - √
5. According to the data, solutions included into acid group are…..a. I and IIb. I and IIIc. II and IIId. II and IVe. III and IV
Answer :
Indicator : The student can calculate the Ionization degree and the acid-base
constancy. (C2,K1)
6. Universal indicator paper is dipped into a weak acid solution 0.1 M of HA. The color solution is similar to the universal indicator which is dipped into 0.01 M of H2SO4. The ionization constant of the weak acid is .... (C2,K1)
a. 1 × 10-3
b. 2 × 10-3
c. 4 × 10-3
d. 4 × 10-2
e. 4 × 10-1
Indicator : The student can identifying of acid-base strength
7. The following is the experiment result of electrical conductivity of some solutions.
Substance Lamp Other Observations1 Bright light Much bubbles2 Dim light Much bubbles3 Dim light Much bubbles4 No light A little bubbles5 No light No bubble
According to the data, the strong acid solution is ....a. 1b. 2
c. 3d. 4e. 5
Indicator : The student can understand the application of pH concept in pollution
8. Air pollutant which can cause acid rain is ....a. Carbon monoxideb. Carbon dioxidec. Sulfur oxided. Hydrocarbone. Dust
Indicator : Student can calculate quantities of reactant and product on electrolyte
solution from product of titration acid-base. (C2,K1)
9. If 20 mL of phosphoric acid, 0.1 M of H3PO4 is titrated by 0.2 M of NaOH solution so that it completely becomes HPO4
2-, the base volume needed is ....a. 10 mLb. 20 mLc. 25 mLd. 30 mLe. 40 mL
Indicator : The student can describe the characteristic of buffer solution (C1,K1 )
10.A buffer solution can be made by mixing solutions ....a. Phosphoric acid and sodium phosphateb. Acetic acid and sodium nitratec. Acetic acid and sodium phosphated. Nitric acid and sodium sulfatee. Acetic acid and sodium sulfate
Indicator : The student determining pH or pOH of buffer solution (C1,K2)
11. The amount of CH3COOK (Mr = 98) that is contained in 100 mL of CH3COOK solution if the solution has pH value of 9 is .... (Ka CH3COOH = 10-5)
a. 0.245b. 0.49c. 0.98d. 9.8
e. 19.6 Indicator : The student describe the characteristic of buffer solution and play of buffer solution
on creature bodies. (C,K)
12. Normally the pH value of human blood ranges from 7.35 to 7.45. The condition is maintained by buffer solution. Besides, there is also buffer solution in cell and saliva gland. The followings are buffer solutions in our body, except ....
Indicator : The student can determine the type of salt that do hydrolysis on water and pH of salt solution. (C1,K1)
13. When dissolved in water, the following salt is hydrolyzed forming a basic solution ....a. KCNb. K2SO4
c. NH4CNd. NH4Cle. (NH4)2SO4
Indicator : To predict formed precipitate from a reaction based on solubility principle and KSP.
14. At a certain time, 0.350 g of BaF2 (Mr = 175) dissolves in water to make 1 L of saturated solution. The solubility product of BaF2 at that temperature is ....
a. 1.7 × 10-2
b. 3.2 × 10-6
c. 3.2 × 10-8
d. 3.2 × 10-9
e. 4.0 × 10-9
Indicator : The student can calculate the pH of salt Hydrolysis solution.
15. 200 mL of HCl 0.2 M is added into 100 mL of NH4OH 0.4 M (Kb = 2 × 10-5). The pH value of the mixture is ....
a. 5
b. 6c. 8d. 10e. 11
Indicator : The student can predicting the formation of sediment based on Ksp value.
16. If 100 mL of NaCl 0.002 M is mixed with 200 mL Pb(NO3)2 0.003 M (Ksp of PbCl2 = 1 × 10-5), it will happen ....
a. There is no sedimentationb. There is sediment of NaClc. Saturated solutiond. There is sediment of PbCl2e. There is sediment of NaNO3
Indicator : The student can defined the characteristic colloid system
17. The combination that is imposible to generate colloid system is ....a. Gas – liquid substanceb. Gas – gas substancec. Liquid – liquid substanced. Solid – solid substancee. Solid – liquid substance
Indicator : The student can group the properties of colloids and its application in daily life.
18. One of the following colloid systems that belongs to aerosol group is ....a. milkb. fogc. foamd. gele. ink
Indicator : The student can group the properties of colloids and its application in daily life.
19. A kidney-failure patient has to underg blood-washing process with relatively expensive cost. Blood-washing method is based on the principles of ....
a. dialysis
b. electolysis
c. peptisation
d. electrophoresis
e. hydroysis
Indicator : The student can make several colloid system with surrounding materials.
20. There are some samples of sol making
1. seaweed gelatin in water
2. H2S gas in SO2 solution
3. FeCl3 in hot water
4. Sulfur in water
Sols produced by dispersion method are ....
a. 1 and 3b. 1 and 4c. 3 and 4d. 2 and 3e. 2 and 4
Essay
1. Acetylsalicylates (aspirin), HC9H7O4, is mostly used as analgesic drug. Determine the pH of 0.018 M of aspirin solution at body temperature (Ka at 37°C = 3.6 × 10-4).
2. Look the following table!
Indicators pH range Color ChangeMethyl red 4.2 – 6.3 Red-yellowBromothymol blue 6.0 – 7.6 Yellow-blueCresol red 7.0 – 8.8 Yellow-red
A solution is yellow with methyl red, blue with bromothymol blue, and yellow with cresol red. Determine the pH of the solution!
3. Enamel contains calcium hydroxyapatite, Ca5(PO4)3OH. The use of toothpaste containing fluoride ion prevents the damage of enamel because fluoride ion will react with calcium hydroxyapatite to form fluoroapatite, Ca5(PO4)3. Calculate the solubility of Ca5(PO4)3OH and Ca5(PO4)3F in water! (Ksp Ca5(PO4)3OH = 6.8 × 10-37 and Ksp Ca5(PO4)3F = 1 × 10-60).
4. Write two examples of emulsion colloid system!
5. What is Tyndall effect? Give some examples!
ACID AND BASE
DEFINITION OF ACID-BASE
17. Based on Arrhenius theory, a substance is classified into base if ....f. It will ionize in waterg. It will release H+ ion in waterh. It will release OH- in wateri. It can give protonsj. It can accept pair of electrons18. The acid conjugate from HSO4
- is ....a. H2SO4
b. SO42-
c. H2Od. OH-
e. H3O+
19. HClO4 compound can be acidic or basic. Reaction showing HClO4 as basic is ....
f. HClO4 + NH2- ClO4
- + NH3
g. HClO4 + NH3 ClO4- + NH4
+
h. HClO4 + H2O ClO4- + H3O+
i. HClO4 + OH- ClO4- + H2O
j. HClO4 + N2H5+ H2ClO4 + N2H4
20. In NH3 dissolving, it will occur equilibrium :
NH3 (aq) + H2O (l) NH4+ (aq) + OH- (aq)
The one which is the pair of acid base conjugate is ....a. NH3 and H2Ob. NH4
+ and OH-
c. NH3 and OH-
d. NH2- and NH3
e. H2O and OH-
IDENTIFYING ACID-BASE SOLUTIONS BY INDICATORS
Use the following data to answer no. 5 and 6
Solution Litmus Color after DippingRed Blue
I √ -II - √III √ -IV - √
21. Solutions included into acid group are ....a. I and IIb. I and IIIc. II and IIId. II and IVe. III and IV22. Solutions included into base group are ....a. I and IIb. I and IIIc. II and IIId. II and IVe. III and IV
ACID-BASE STRENGTH
23. The following is the experiment result of electrical conductivity of some solutions.
Substance Lamp Other Observations1 Bright light Much bubbles2 Dim light Much bubbles3 Dim light Much bubbles4 No light A little bubbles5 No light No bubble
According to the data, the strong acid solution is ....f. 1g. 2h. 3i. 4j. 524. The dissociation constant of a weak acid is 10-7. If the acid solution has pH = 4, its
concentration is ....a. 10-1 Mb. 10-3 Mc. 10-4 Md. 10-5 Me. 10-7 M25. 0.1 of MOH as a weak base has pH = 10. The base constant of MOH is ....a. 10-9 Mb. 10-7 Mc. 10-4 M
d. 10-3 Me. 10-2 M26. 500 mL of 0.0005 M Ca(OH)2 solution has pH ....a. 11b. 10c. 9d. 4e. 327. A group of students do the experiment in laboratory to test the acidity of a
solution by using indicators.Data of the indicators are as follows.
Indicators pH Range Color ChangesMethyl red 3.1 – 4.4 Red-yellowBromocresol green 3.8 – 5.4 Yellow-blueBromothymol blue 6.0 – 7.6 Yellow-bluePhenolphthalein 8.0 – 10.0 Colorless-pink
If the pH balue is 7.8, the pair of indicators that have been used are ....a. Bromocresol green and bromothymol blueb. Methyl red and bromocresol freenc. Bromothymol blue and phenolphthaleind. Methyl red and bromothymol bluee. Bromocresol green and phenolphthalein28. Universal indicator paper is dipped into a weak acid solution 0.1 M of HA. The
color solution is similar to the universal indicator which is dipped into 0.01 M of H2SO4. The ionization constant of the weak acid is ....
f. 1 × 10-3
g. 2 × 10-3
h. 4 × 10-3
i. 4 × 10-2
j. 4 × 10-1
29. To gain 200 mL of H2SO4 solution with pH = 2 – log 2, into 0.2 M of H2SO4 must be added water as much as .... mL.
a. 5b. 10c. 15d. 20e. 2530. If several substances are dissolved into water until it reaches 1 M concentration,
the solution having the highest pH is .....a. NaHSO4
b. NaClc. FeCl3
d. NH4Cle. CH3COONa31. If 0.08 M of NH4OH solution is dissociated 1.25%, pH of the solution is ....
a. 9b. 10c. 11d. 12.5e. Cannot be calculated because Kb is unknown32. The pH value of 100 mL 1 × 10-9 M of HCl is ....a. 1b. 3c. 5d. 7e. 9
ACID-BASE REACTION
33. Air pollutant which can cause acid rain is ....f. Carbon monoxideg. Carbon dioxideh. Sulfur oxidei. Hydrocarbonj. Dust34. To neutralize 20 mL of sulfuric acid, it is needed 20 mL 0.1 M of NaOH. The
concentration of sulfuric acid is ....a. 1.00 Mb. 0.50 Mc. 0.20 Md. 0.15 Me. 0.05 M35. If 20 mL of phosphoric acid, 0.1 M of H3PO4 is titrated by 0.2 M of NaOH solution
so that it completely becomes HPO42-, the base volume needed is ....
f. 10 mLg. 20 mLh. 25 mLi. 30 mLj. 40 mL36. One of the following salts which is formed as teh result of the reaction of strong
acid and weak base is ....a. CH3OOHb. CH3COONac. Na3PO4
d. NH4Cle. MgCl2
Essay
1. Which ones of the following molecules or ions is amphoteric?
a. H2Ob. SO4
2-
c. NH4+
d. HCO3-
2. On a laboratory table, the are 4 beaked glasses, each of which is filled with aqueous of sulfuric acid (accumulator), aqueous of soaps, aqueous of limestone, and aqueous of vinegar. If red litmus paper and blue litmus paper are dipped into each of the solutions, what will happen?
3. Look at the following table!
No. Acid Name Concentration (M) Ka
1 Acetic acid 0.1 1.8 × 10-5
2 Benzoic acid 0.1 6.7 × 10-6
3 Fluoric acid 0.1 7.2 × 10-10
According to the table above, arrange the substances based on the acid strength started from the weakest to the strongest!
4. Acetylsalicylates (aspirin), HC9H7O4, is mostly used as analgesic drug. Determine the pH of 0.018 M of aspirin solution at body temperature (Ka at 37°C = 3.6 × 10-4)
5. Look the following table!
Indicators pH range Color ChangeMethyl red 4.2 – 6.3 Red-yellowBromothymol blue 6.0 – 7.6 Yellow-blueCresol red 7.0 – 8.8 Yellow-red
A solution is yellow with methyl red, blue with bromothymol blue, and yellow with cresol red. Determine the pH of the solution!
6. Acetylsalicylates (aspirin), HC9H7O4, is mostly used as analgesic drug. Determine the pH of 0.018 M of aspirin solution at body temperature (Ka at 37°C = 3.6 × 10-4)
7. Look the following table!
Indicators pH range Color ChangeMethyl red 4.2 – 6.3 Red-yellowBromothymol blue 6.0 – 7.6 Yellow-blueCresol red 7.0 – 8.8 Yellow-red
A solution is yellow with methyl red, blue with bromothymol blue, and yellow with cresol red. Determine the pH of the solution!
8. Enamel contains calcium hydroxyapatite, Ca5(PO4)3OH. The use of toothpaste containing fluoride ion prevents the damage of enamel because fluoride ion will react with calcium hydroxyapatite to form fluoroapatite, Ca5(PO4)3. Calculate the solubility of Ca5(PO4)3OH and Ca5(PO4)3F in water! (Ksp Ca5(PO4)3OH = 6.8 × 10-37 and Ksp Ca5(PO4)3F = 1 × 10-60).
9. Write two examples of emulsion colloid system!
10. What is Tyndall effect? Give some examples!
IONIC EQUILIBRIUM IN SOLUTION
Multiple Choice
BUFFER SOLUTION
37. A buffer solution can be made by mixing solutions ....f. Phosphoric acid and sodium phosphateg. Acetic acid and sodium nitrateh. Acetic acid and sodium phosphatei. Nitric acid and sodium sulfatej. Acetic acid and sodium sulfate38. One of the mixture of solutions below that can form a buffer solution is ....a. 50 mL of NaOH 0.2 M and 50 mL of CH3COOH 0.1 Mb. 35 mL of NaOH 0.2 M and 70 mL of NH3 (aq) 0.1 Mc. 40 mL of NaOH 0.1 M and 60 mL of NH3 (aq) 0.1 Md. 50 mL of NaOH 0.1 M and 50 mL of CH3COOH 0.2 M
e. 50 mL of NaOH 0.2 M and 70 mL of CH3COOH 0.1 M
DETERMINING pH OR pOH OF A BUFFER SOLUTION
39. In a volume of 1 L solution, 0.2 moles of acetic acid (Ka = 10-5) is mixed with 0.02 moles of sodium acetate to make buffer solution. The pH value of the solution is ....
a. 7b. 6c. 5d. 4e. 340. If NH4Cl solution with the same volume and concentration is added into 200 mL
of NH4OH solution 0.2 M, the pH value of the solution is ....(Kb 0.2 M NH4OH = 10-5)a. 5b. 6c. 8d. 9e. 1041. The amount of CH3COOK (Mr = 98) that is contained in 100 mL of CH3COOK
solution if the solution has pH value of 9 is .... (Ka CH3COOH = 10-5)f. 0.245g. 0.49h. 0.98i. 9.8j. 19.642. A volume of 750 mL of a buffer solution made from mixture of CH3COOH 0.3 M
solution and KOH 0.2 M solution has the pH value of 5 – log 3.2. The volume ratio of CH3COOH and KOH mixed is .... (Ka = 1.6 × 10-5)
THE FUNCTION OF BUFFER SOLUTION WITHIN THE BODY OF AN ORGANISM
43. Normally the pH value of human blood ranges from 7.35 to 7.45. The condition is maintained by buffer solution. Besides, there is also buffer solution in cell and saliva gland. The followings are buffer solutions in our body, except ....
The pair of salt that dissolve in water to form acidic solution is ....
a. 2 and 5b. 2 and 4c. 3 and 4d. 4 and 5e. 2 and 345. When dissolved in water, the following salt is hydrolyzed forming a basic
solution ....f. KCNg. K2SO4
h. NH4CNi. NH4Clj. (NH4)2SO4
46. The compound that in its solution in water cannot be hydrolized is ....a. NH4Clb. K2SO4
c. CH3COOKd. (NH4)2SO4
e. CH3COONH4
47. The following solution that can change the color of red litmus into blue is ....a. CH3COONab. CH3COONH4
c. Al2(SO4)3
d. NH4CNe. Na2SO4
48. The following pair of salt that completely dissolve in water is ....a. CH3COOK and CH3COONab. NH4Cl and NH4CNc. CH3COONH4 and K3PO4
d. NaCl and MgSO4
e. CH3COONH4 and NH4CN
pH OF SALT HYDROLYSIS
49. 10.7 grams of NH4Cl is dissolved in water to make solution of 0.5 L. The pH value of the solution is ....
a. 5 – log 2b. 5
c. 5 + log 2d. 9 – log 2e. 950. 200 mL of HCl 0.2 M is added into 100 mL of NH4OH 0.4 M (Kb = 2 × 10-5). The pH
value of the mixture is ....f. 5g. 6h. 8i. 10j. 11
DETERMINING THE SOLUBILITY BASED ON THE VALUE OF Ksp OR VICE VERSA
51. The following salt of silver that is the easiest t dissolve is ....a. AgCl (Ksp = 1 × 10-10)b. AgBr (Ksp = 5 × 10-13)c. Ag2SO4 (Ksp = 5 × 10-13)d. AgI (Ksp = 1 × 10-16)e. Ag2CrO4 (Ksp = 4 × 10-18)52. At a certain time, 0.350 g of BaF2 (Mr = 175) dissolves in water to make 1 L of
saturated solution. The solubility product of BaF2 at that temperature is ....f. 1.7 × 10-2
g. 3.2 × 10-6
h. 3.2 × 10-8
i. 3.2 × 10-9
j. 4.0 × 10-9
53. A saturated solution of X(OH)2 has pH value of 9. The Ksp value of X(OH)2 is ....a. 10-10
b. 5 × 10-11
c. 10-15
d. 5 × 10-16
e. 10-17
PREDICTING THE FORMATION OF SEDIMENT BASED ON Ksp VALUE
54. If 100 mL of NaCl 0.002 M is mixed with 200 mL Pb(NO3)2 0.003 M (Ksp of PbCl2 = 1 × 10-5), it will happen ....
f. There is no sedimentationg. There is sediment of NaClh. Saturated solutioni. There is sediment of PbCl2j. There is sediment of NaNO3
Essay
2. Arrange the following salts based on the decreasing value of pH if the concentration of each solution is 0.1 M!a. KNO3b. NaHCO3c. Na2CO3d. (NH4)2SO4
15. Enamel contains calcium hydroxyapatite, Ca5(PO4)3OH. The use of toothpaste containing fluoride ion prevents the damage of enamel because fluoride ion will react with calcium hydroxyapatite to form fluoroapatite, Ca5(PO4)3. Calculate the solubility of Ca5(PO4)3OH and Ca5(PO4)3F in water! (Ksp Ca5(PO4)3OH = 6.8 × 10-37 and Ksp Ca5(PO4)3F = 1 × 10-60).
COLLOIDS SYSTEMS
Multiple Choice
THE DEFINITION AND THE CLASSIFICATION OF COLLOIDS
18. The combination that is imposible to generate colloid system is ....f. Gas – liquid substanceg. Gas – gas substanceh. Liquid – liquid substancei. Solid – solid substancej. Solid – liquid substance
5.One of the following colloid systems that belongs to aerosol group is ....a. milkb. fog
c. foamd. gele. ink
THE PROPERTIES OF COLLOIDS AND THEIR APPLICATION
9. generally, people use alum to purify water, such as well-water, tap-water or another type of water. Water purifying method using alum is related to colloid property of ....
a. brownian motion
b. electolysis
c. tyndall effect
d. coalgulation
e. adsorption
10. A kidney-failure patient has to underg blood-washing process with relatively expensive cost. Blood-washing method is based on the principles of ....
a. dialysis
b. electolysis
c. peptisation
d. electrophoresis
e. hydroysis
MAKING KINDS OF COLLOID SYSTEMS
16. there are some samples of sol making
1. seaweed gelatin in water
2. H2S gas in SO2 solution
3. FeCl3 in hot water
4. Sulfur in water
Sols produced by dispersion method are ....
f. 1 and 3g. 1 and 4h. 3 and 4
i. 2 and 3j. 2 and 4
20.Colloid separation by filtration method using membrane coating that is put into flowing water is known as process of ....a. dispersionb. electrophoresisc. electrolysisd. dialysise. condensation
Essay
16. What is the difference between aerosol and solid sol?17. Write two examples of emulsion colloid system!18. What is Tyndall effect? Give some examples!
