Date Quiz 8-1 Acids and Bases pH
Name __________________________________________________ Period ________ Date ______________________ Quiz 8-1 Acids and Bases pH – Version 6
Total Points: _______/10
1. (a) Name the acid H2SO4. Sulfuric acid
(½ pt)
(b) Write the balanced dissociation equation for H2SO4 in an aqueous solution. 𝐻2 𝑆𝑂4 (𝑎𝑞) → 2 𝐻 + (𝑎𝑞) + 𝑆𝑂42− (𝑎𝑞) (c) Determine the [H+] in 0.0350 M H2SO4.
(½ pt)
Answer (½ pt)
Show Work (1/4 pt)
Sigfigs (1/4 pt)
(d) Calculate the pH of 0.00350 M H2SO4. 𝑝𝐻 = −𝑙𝑜𝑔[𝐻 + ] = −𝑙𝑜𝑔(0.0700) = 1.155
Answer (½ pt)
Work (1/4)
SF (1/4)
(e) Calculate the pOH of 0.0350 M H2SO4. 𝑝𝐻 + 𝑝𝑂𝐻 = 14.00
Answer (½ pt)
Work (1/4)
SF (1/4)
Answer (½ pt)
Work (1/4)
SF (1/4 pt)
𝐻2 𝑆𝑂4 (𝑎𝑞) → 2 𝐻 + (𝑎𝑞) + 𝑆𝑂42− (𝑎𝑞) 0.0350 M 0.0700 M 0.0350 M [𝐻 + ] = 0.0700 𝑀
𝑝𝑂𝐻 = 14.00 − 𝑝𝐻 = 14.00 − 1.155 = 12.845
(f) Calculate the [OH-] in 0.0350 M H2SO4. [𝑂𝐻 − ] = 10−𝑝𝑂𝐻 = 10−12.845 = 1.43 × 10−13 𝑀
2. (a) Write the chemical formula of lithium hydroxide. LiOH
(½ pt)
(b) Write the balanced dissociation equation for lithium hydroxide in an aqueous solution.
(½ pt)
𝐿𝑖𝑂𝐻(𝑎𝑞) → 𝐿𝑖 + (𝑎𝑞) + 𝑂𝐻 − (𝑎𝑞) (g) Determine the [H+] in lithium hydroxide pH 11.50 [𝐻 + ] = 10−𝑝𝐻 = 10−11.50 = 3.2 × 10−12 𝑀
Answer (½ pt)
Work (1/4)
SF (1/4 pt)
(h) Calculate the pOH of lithium hydroxide pH 11.50 𝑝𝐻 + 𝑝𝑂𝐻 = 14.00
Answer (½ pt)
Work (1/4)
SF (1/4 pt)
𝑝𝑂𝐻 = 14.00 − 𝑝𝐻 = 14.00 − 11.50 = 2.50
Name __________________________________________________ Period ________ Date ______________________ (i) Calculate the [OH-] in lithium hydroxide pH 11.50 [𝑂𝐻 − ] = 10−𝑝𝑂𝐻 = 10−2.50 = 3.2 × 10−3 𝑀
Answer (½ pt)
Work (1/4)
3. When bromothymol blue is added to H2SO4 what color does it turn? yellow 4. When bromothymol blue is added to a lithium hydroxide solution, what color does it turn? blue
SF (1/4 pt)
(½ pt)
(½ pt)
Total Points: _______/10
1. (a) Name the acid H2SO4. Sulfuric acid
(½ pt)
(b) Write the balanced dissociation equation for H2SO4 in an aqueous solution. 𝐻2 𝑆𝑂4 (𝑎𝑞) → 2 𝐻 + (𝑎𝑞) + 𝑆𝑂42− (𝑎𝑞) (c) Determine the [H+] in 0.0350 M H2SO4.
(½ pt)
Answer (½ pt)
Show Work (1/4 pt)
Sigfigs (1/4 pt)
(d) Calculate the pH of 0.00350 M H2SO4. 𝑝𝐻 = −𝑙𝑜𝑔[𝐻 + ] = −𝑙𝑜𝑔(0.0700) = 1.155
Answer (½ pt)
Work (1/4)
SF (1/4)
(e) Calculate the pOH of 0.0350 M H2SO4. 𝑝𝐻 + 𝑝𝑂𝐻 = 14.00
Answer (½ pt)
Work (1/4)
SF (1/4)
Answer (½ pt)
Work (1/4)
SF (1/4 pt)
𝐻2 𝑆𝑂4 (𝑎𝑞) → 2 𝐻 + (𝑎𝑞) + 𝑆𝑂42− (𝑎𝑞) 0.0350 M 0.0700 M 0.0350 M [𝐻 + ] = 0.0700 𝑀
𝑝𝑂𝐻 = 14.00 − 𝑝𝐻 = 14.00 − 1.155 = 12.845
(f) Calculate the [OH-] in 0.0350 M H2SO4. [𝑂𝐻 − ] = 10−𝑝𝑂𝐻 = 10−12.845 = 1.43 × 10−13 𝑀
2. (a) Write the chemical formula of lithium hydroxide. LiOH
(½ pt)
(b) Write the balanced dissociation equation for lithium hydroxide in an aqueous solution.
(½ pt)
𝐿𝑖𝑂𝐻(𝑎𝑞) → 𝐿𝑖 + (𝑎𝑞) + 𝑂𝐻 − (𝑎𝑞) (g) Determine the [H+] in lithium hydroxide pH 11.50 [𝐻 + ] = 10−𝑝𝐻 = 10−11.50 = 3.2 × 10−12 𝑀
Answer (½ pt)
Work (1/4)
SF (1/4 pt)
(h) Calculate the pOH of lithium hydroxide pH 11.50 𝑝𝐻 + 𝑝𝑂𝐻 = 14.00
Answer (½ pt)
Work (1/4)
SF (1/4 pt)
𝑝𝑂𝐻 = 14.00 − 𝑝𝐻 = 14.00 − 11.50 = 2.50
Name __________________________________________________ Period ________ Date ______________________ (i) Calculate the [OH-] in lithium hydroxide pH 11.50 [𝑂𝐻 − ] = 10−𝑝𝑂𝐻 = 10−2.50 = 3.2 × 10−3 𝑀
Answer (½ pt)
Work (1/4)
3. When bromothymol blue is added to H2SO4 what color does it turn? yellow 4. When bromothymol blue is added to a lithium hydroxide solution, what color does it turn? blue
SF (1/4 pt)
(½ pt)
(½ pt)
