Worksheet: Acids, Bases

1
Worksheet Acids, Bases pHKey
2
1. Label the substance below as an acid, base or
neutral substance.

• pH 7 (b) pOH 9
• (c) pH 3 (d) pOH 4 (e) pH 13 (f) pOH
  7

3
1. Label the substance below as an acid, base or
neutral substance.

• pH 7 N (b) pOH 9 A
• (c) pH 3 A (d) pOH 4 B
• (e) pH 13 B (f) pOH 7 N

4
2. How does the Arrhenius theory define an acid?
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2. How does the Arrhenius theory define an acid?

• An acid produces H3O ions when dissolved in
  water.

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3. How does the Arrhenius theory define an base?
7
3. How does the Arrhenius theory define an base?

• A base produces OH- ions when dissolved in water.

8
4. Differentiate between an electrolyte and a
nonelectrolyte.
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4. Differentiate between an electrolyte and a
nonelectrolyte.

• An electrolyte dissolves into ions when placed in
  water whereas a nonelectrolyte dissolves into
  molecules.

10
5. What type of substances are electrolytes?
11
5. What type of substances are electrolytes?

• Acids, Bases, Salts

12
6. When H ions are dissolved in water they
become hydronium ions. What is the formula for a
hydronium ion?
13
6. When H ions are dissolved in water they
become hydronium ions. What is the formula for a
hydronium ion?

• H3O

14
7. What is the pH of a solution with a H
4.32 x 10-12?
15
7. What is the pH of a solution with a H
4.32 x 10-12?

• pOH 11.365

16
8. What is the pOH of a solution with a OH-
6.83 x 10-3?
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8. What is the pOH of a solution with a OH-
6.83 x 10-3?

• pOH 2.166

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9. What is the pOH of a solution with a pH 3.8?
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9. What is the pOH of a solution with a pH 3.8?

• pOH 10.2

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10. What is the H in a solution with a pH
7.3?
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10. What is the H in a solution with a pH
7.3?

• H 5.0 x 10-8

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11. What is the OH- in a solution with a pOH
10.7?
23
11. What is the OH- in a solution with a pOH
10.7?

• OH- 2.0 x 10-11

24
12. What is the pH of a solution with a OH-
8.62 x 10-5?
25
12. What is the pH of a solution with a OH-
8.62 x 10-5?

• pH 9.936

26
13a) Write the balanced equation for the
acid-base neutralization of H2SO4 and Ba(OH)2.
27
13a) Write the balanced equation for the
acid-base neutralization of H2SO4 and Ba(OH)2.

• H2SO4 Ba(OH)2 ? BaSO4 2H2O

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13b) Write the balanced equation for the
acid-base neutralization of HF and NaOH.
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13b) Write the balanced equation for the
acid-base neutralization of HF and NaOH.

• HF NaOH ? NaF H2O

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13c) Write the balanced equation for the
acid-base neutralization of HI and Sr(OH)2.
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13c) Write the balanced equation for the
acid-base neutralization of HI and Sr(OH)2.

• 2HI Sr(OH)2 ? SrI2 2H2O

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13d) We often use the equation Macid x Vacid
Mbase x Vbase. Which of the acid-base
neutralization reactions above could we not use
this formula for? Explain.
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13d) We often use the equation Macid x Vacid
Mbase x Vbase. Which of the acid-base
neutralization reactions above could we not use
this formula for? Explain.

• The reaction between HI and Sr(OH)2 could not be
  used because the acid and the base do not react
  in a 11 ratio.

34
13e) In an acid-base neutralization reaction 26
ml of Ba(OH)2 reacts with 16 ml of 0.48M H2SO4.
What is the molarity of the Ba(OH)2?
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13e) In an acid-base neutralization reaction 26
ml of Ba(OH)2 reacts with 16 ml of 0.48M H2SO4.
What is the molarity of the Ba(OH)2?

• 0.30M

36
13f) How many milliliters of 0.57M HF will react
with 39 ml of 0.86M NaOH in an acid-base
neutralization reaction?
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13f) How many milliliters of 0.57M HF will react
with 39 ml of 0.86M NaOH in an acid-base
neutralization reaction?

• 59 ml