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Name _________________________________________________ Group _______________
Date __________________________________________________ List # _______________
                                Reviewing concepts

1.- Use the symbols <,>, and = to express the relationship between the concentration of
H+ and OH- ions in acidic, neutral, and basic solutions.



2.- Write the chemical equation that represents the self-ionization of water.



3.- Classify the following acids as strong or weak.

a)H2CO3        b)HCN             c)H2SO4      d)HNO3           e)HC2H3O2

4.- Consider the pH of the following items: root beer pH=5.8, pickles pH=3.5, glass
cleaner pH=7.8, kitchen cleaner pH=10.9, cranberry juice pH=2.9. Place the items in
order of most acidic to most basic. __________________________________________________
Which item has the highest [H+]? ____________Which item has the highest[OH-]?_______

5.- Use the data in the table below to answer the following questions.

Substance    Ammonia        Lemon         Antacid        Blood         Soft drink
pH           11.3           2.3           9.4            7.4           3.0
   a) Which substance is the most basic? _____________________________________

    b) Which substance is closest to neutral?___________________________________

    c) Which substance has a pOH of 11.0?_____________________________________

    d) Which substance is the most acidic?_____________________________________

6.- What is the [OH-] in an aqueous solution in which [H+]=5.4 x 10-3 M?



7.- What is the pH and pOH of the solution described in question #6 ?



8.- What is the pH of a bile sample that has a [H+] = 1 x 10 -8 M? Is the solution acidic or
basic?

9.- Identify the acid, base, conjugate acid and conjugate base in the following
equation:               NH3 + H2O <--> NH4+ + OH-


10.- Complete the following table:
[H+]             [OH-]             pH                    pOH                Acidic, basic or
                                                                            neutral
                   1 x 10 -6 M
         -5
2.8 x 10
6.4 x 10 -12
Neutral


11.- Determine the pH of each of the following solutions, and classify each as acidic,
basic or neutral.

a)[H+]= 5.6 x 10 -6                                    b)[H+]= 9.2 x 10 -9

c)[H+]= 7.2 x 10 -12                                   d) [OH-]= 6.3 x 10 -5

12.- What factor determines the acidity of a solution?_________________________________

13.- What is the range of pH values in the following solutions:

a)basic                               b)acidic                                  c)neutral

14.- What method(s) can you use the measure the pH of a solution?



15. What happens to the [H+] as the pH of a solution increases?



16.- What factor determines whether an acid or base is strong or weak?



17.- Classify the following bases as strong or weak.

a)NaOH          b)Al(OH)3      c)Mg(OH)2               d)NH3

18.- Neutralization reaction occur when an acid and a base react to form salt and
water. Which of the following reactions are neutralization reactions?

a)HNO3 + NaOH  NaNO3 + H2O                   b)HCl + LiOH LiCl + H2O

c)Zn + HCl ZnCl2 + H2                d) HCl + NaOH  NaCl + H2O

19.- Antacids, like milk of magnesia, are used to neutralize the HCl (gastric juice) in our
stomach. Does the pH of the stomach increase or decrease? Explain.



20.- What is the concentration of[ H+] and [OH-] in pure water at 25 C?

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Reviewing concepts 2

  • 1. Name _________________________________________________ Group _______________ Date __________________________________________________ List # _______________ Reviewing concepts 1.- Use the symbols <,>, and = to express the relationship between the concentration of H+ and OH- ions in acidic, neutral, and basic solutions. 2.- Write the chemical equation that represents the self-ionization of water. 3.- Classify the following acids as strong or weak. a)H2CO3 b)HCN c)H2SO4 d)HNO3 e)HC2H3O2 4.- Consider the pH of the following items: root beer pH=5.8, pickles pH=3.5, glass cleaner pH=7.8, kitchen cleaner pH=10.9, cranberry juice pH=2.9. Place the items in order of most acidic to most basic. __________________________________________________ Which item has the highest [H+]? ____________Which item has the highest[OH-]?_______ 5.- Use the data in the table below to answer the following questions. Substance Ammonia Lemon Antacid Blood Soft drink pH 11.3 2.3 9.4 7.4 3.0 a) Which substance is the most basic? _____________________________________ b) Which substance is closest to neutral?___________________________________ c) Which substance has a pOH of 11.0?_____________________________________ d) Which substance is the most acidic?_____________________________________ 6.- What is the [OH-] in an aqueous solution in which [H+]=5.4 x 10-3 M? 7.- What is the pH and pOH of the solution described in question #6 ? 8.- What is the pH of a bile sample that has a [H+] = 1 x 10 -8 M? Is the solution acidic or basic? 9.- Identify the acid, base, conjugate acid and conjugate base in the following equation: NH3 + H2O <--> NH4+ + OH- 10.- Complete the following table: [H+] [OH-] pH pOH Acidic, basic or neutral 1 x 10 -6 M -5 2.8 x 10 6.4 x 10 -12
  • 2. Neutral 11.- Determine the pH of each of the following solutions, and classify each as acidic, basic or neutral. a)[H+]= 5.6 x 10 -6 b)[H+]= 9.2 x 10 -9 c)[H+]= 7.2 x 10 -12 d) [OH-]= 6.3 x 10 -5 12.- What factor determines the acidity of a solution?_________________________________ 13.- What is the range of pH values in the following solutions: a)basic b)acidic c)neutral 14.- What method(s) can you use the measure the pH of a solution? 15. What happens to the [H+] as the pH of a solution increases? 16.- What factor determines whether an acid or base is strong or weak? 17.- Classify the following bases as strong or weak. a)NaOH b)Al(OH)3 c)Mg(OH)2 d)NH3 18.- Neutralization reaction occur when an acid and a base react to form salt and water. Which of the following reactions are neutralization reactions? a)HNO3 + NaOH  NaNO3 + H2O b)HCl + LiOH LiCl + H2O c)Zn + HCl ZnCl2 + H2 d) HCl + NaOH  NaCl + H2O 19.- Antacids, like milk of magnesia, are used to neutralize the HCl (gastric juice) in our stomach. Does the pH of the stomach increase or decrease? Explain. 20.- What is the concentration of[ H+] and [OH-] in pure water at 25 C?