5. Acetic acid is a weak monoprotic acid. Its concentration is 0.20 M and its Ka value is 1.8x105. Calculate its pH value. a. 0.698 b. 2.72 c. 11.28 d. none of the answer are correct 6. Naz CO3 forms alkaline solution when dissolved in water. Why? a. Because water hydrolysis produces hydroxide b. CO32- ions reacts with H* from water to produce HCO3 c. Na2 CO3 dissociates completely to produce CO32- ions d. CO;?- ions reacts with water to produce carbonic acid 7. The buffer solution maintains pH by some events except a. The addition of a little acid b. The addition of a little base c. Addition of water d. The addition of excess acid 8. Which of the following is TRUE about buffer solution? a. pH of buffer solution will never change despite addition of small amount of base or acid b. Buffer can be made by mixing strong acid and salt ot its conjugate base or by mixing strong base with salt of its conjugate acid
5. Acetic acid is a weak monoprotic acid. Its concentration is 0.20 M and its Ka value is 1.8x105. Calculate its pH value. a. 0.698 b. 2.72 c. 11.28 d. none of the answer are correct 6. Naz CO3 forms alkaline solution when dissolved in water. Why? a. Because water hydrolysis produces hydroxide b. CO32- ions reacts with H* from water to produce HCO3 c. Na2 CO3 dissociates completely to produce CO32- ions d. CO;?- ions reacts with water to produce carbonic acid 7. The buffer solution maintains pH by some events except a. The addition of a little acid b. The addition of a little base c. Addition of water d. The addition of excess acid 8. Which of the following is TRUE about buffer solution? a. pH of buffer solution will never change despite addition of small amount of base or acid b. Buffer can be made by mixing strong acid and salt ot its conjugate base or by mixing strong base with salt of its conjugate acid
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Transcribed Image Text:5. Acetic acid is a weak monoprotic acid. Its concentration is 0.20 M and its Ka value is
1.8x10-5 . Calculate its pH value.
a. 0.698
b. 2.72
c. 11.28
d. none of the
answer are correct
6. Naz CO3 forms alkaline solution when dissolved in water. Why?
a. Because water hydrolysis produces hydroxide
b. CO32- ions reacts with Ht from water to produce HCO3
c. Naz CO3 dissociates completely to produce CO;2- ions
d. CO32- ions reacts with water to produce carbonic acid
7. The buffer solution maintains pH by some events except
a. The addition of a little acid
b. The addition of a little base
c. Addition of water
d. The addition of excess acid
8. Which of the following is TRUE about buffer solution?
a. pH of buffer solution will never change despite addition of small amount of base
or acid
b. Buffer can be made by mixing strong acid and salt ot its conjugate base or by
mixing strong base with salt of its conjugate acid
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