A 1.00 liter solution contains 0.57 M hydrofluoric acid and 0.43 M sodium fluori
ID: 842468 • Letter: A
Question
A 1.00 liter solution contains 0.57 M hydrofluoric acid and 0.43 M sodium fluoride.
If 25.0 mL of water are added to this system,
indicate whether the following statements are TRUE (T) or FALSE (F).
(Note the the volume MUST CHANGE upon the addition of water.)
A. The concentration of HF will increase.
B. The concentration of F- will increase.
C. The equilibrium concentration of H3O+ will remain the same.
D. The pH will remain the same.
E. The ratio of [HF] / [F-] will decrease.
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A 1.00 liter solution contains 0.36 moles acetic acid and 0.28 moles potassium acetate.
If 0.14 moles of nitric acid are added to this system,
indicate whether the following statements are TRUE (T) or FALSE (F).
(Assume that the volume does not change upon the addition of nitric acid.)
A. The number of moles of CH3COOH will remain the same.
B. The number of moles of CH3COO- will decrease.
C. The equilibrium concentration of H3O+ will increase.
D. The pH will increase.
E. The ratio of [CH3COOH] / [CH3COO-] will remain the same.
Explanation / Answer
A 1.00 liter solution contains 0.57 M hydrofluoric acid and 0.43 M sodium fluoride.
If 25.0 mL of water are added to this system,
indicate whether the following statements are TRUE (T) or FALSE (F).
(Note the the volume MUST CHANGE upon the addition of water.) TRUE (T)
A. The concentration of HF will increase. FALSE (F)
B. The concentration of F- will increase.
C. The equilibrium concentration of H3O+ will remain the same. FALSE (F)
D. The pH will remain the same. FALSE (F)
E. The ratio of [HF] / [F-] will decrease. FALSE (F)
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A 1.00 liter solution contains 0.36 moles acetic acid and 0.28 moles potassium acetate.
If 0.14 moles of nitric acid are added to this system,
indicate whether the following statements are TRUE (T) or FALSE (F).
(Assume that the volume does not change upon the addition of nitric acid.)
A. The number of moles of CH3COOH will remain the same. FALSE (F)
B. The number of moles of CH3COO- will decrease. FALSE (F)
C. The equilibrium concentration of H3O+ will increase. TRUE (T)
D. The pH will increase. FALSE (F)
E. The ratio of [CH3COOH] / [CH3COO-] will remain the same. FALSE (F)
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