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Information on the definition of salts, the completion of a table showing the ph values and acid-base properties of various salts, and the prediction of the products and ph changes when certain salts are added to water. It also includes the dissociation equations and ph effects for specific salts.
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During Class Invention Salts I Name__________________________
7a. Write the dissociation equation which describes what happens when NaC 2 H 3 O 2 (s) is added to water. NaC 2 H 3 O 2 (aq) + H 2 O (l) HC 2 H 3 O 2 (aq) + NaOH (aq) C 2 H 3 O 2 - (aq) + H 2 O (l) HC 2 H 3 O 2 (aq) + OH- (aq) net ionic equation b. Write the equation which describes the acidic character of Na+ (aq). Write the equilibrium expression and estimate Ka for Na+ (aq). Na+ (aq) + H 2 O (l) NaOH (aq) + H+ (aq) Ka = [NaOH][H+] [Na+] =^ Kw Kb =^ 1 x 10-^14 very large = very small c. Write the equation which describes the basic character of C 2 H 3 O 2 – (aq). Write the equilibrium expression and calculate the Kb for C 2 H 3 O 2 – (aq). C 2 H 3 O 2 - (aq) + H 2 O (l) HC 2 H 3 O 2 (aq) + OH- (aq) Kb =
Kw Ka =^ 1 x 10-^14 1.8 x 10-^5 = 5.6 x 10
K+ (aq) + CN- (aq) CN-^ (aq) + H 2 O (l) HCN (aq) + OH-^ (aq) KCN is the salt of a strong base and a weak acid. The pH of the solution will be greater than 7.