A 1.00 liter solution contains 0.44 M hydrocyanic acid and 0.33 M potassium cyan
ID: 636321 • Letter: A
Question
A 1.00 liter solution contains 0.44 M hydrocyanic acid and 0.33 M potassium cyanide.
If 25.0 mL of water are added to this system, indicate whether the following statements are true or false.
(Note the the volume MUST CHANGE upon the addition of water.)
_______True OR FalseA. The concentration of HCN will decrease.
_______True OR FalseB. The concentration of CN- will increase.
_______True OR FalseC. The equilibrium concentration of H3O+ will decrease.
_______True OR FalseD. The pH will remain the same.
_______True OR FalseE. The ratio of [HCN] / [CN-] will remain the same.
Explanation / Answer
if we add water to the buffer it will be diluted means concentration of both HCN and KCN will decrease.
_True______True OR FalseA. The concentration of HCN will decrease.
_True______True OR FalseB. The concentration of CN- will increase.
_False______True OR FalseC. The equilibrium concentration of H3O+ will decrease.
True_______True OR FalseD. The pH will remain the same.
_True______True OR FalseE. The ratio of [HCN] / [CN-] will remain the same.
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