A.Write the dissolution reaction for calcium carbonate in water. Use the pull-do

Question

A.Write the dissolution reaction for calcium carbonate in water.

Use the pull-down menus to specify the state of each reactant and product.

Is calcium carbonate considered soluble or not soluble ? ...  
... A. Soluble
... B. Not soluble

Based upon this, the equilibrium constant for this reaction will be: ...  
... A. Greater than 1

B.Write the precipitation reaction for silver sulfide in aqueous solution:

Use the pull-down menus to specify the state of each reactant and product.

Is silver sulfide considered soluble or not soluble ? ...
... A. Soluble
... B. Not soluble

Explanation / Answer

A. The dissolution reaction for calcium carbonate in water is

CaCO3 (s) ----> Ca2+ (aq) + CO32- (aq)

CaCO3 is soluble in water

B.The precipitation reaction for silver sulfide in aqueous solution is

2AgNO3(aq) + Na2S(aq) -----> Ag2S(s) + 2NaNO3(aq)

The formed  Ag2S is insoluble

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