3. Consider the following Indicate the effect of adding the following reagents.

Question

3. Consider the following Indicate the effect of adding the following reagents. H+ (aq) NO2 (aq) + weak acid equilibrium: HNO2(aq) (increase, decrease, or not change) A. Add HNO2 [HNO2] wil [H'] will [NO: 1 will pH will B. Add NaNO2 HNO2] will [FTI will INO2] will pH will [HNO2] will [H] will INO2 ] will [HNO2] will [H] will [NO2] will C. Add HCI D. Add H20 4. Calciu acidifying the solution. Write all the relevant equilibrium equations and explain why adding increase the solubility of calcium carbonate im carbonate is an "insoluble salt". But the solubility of CaCO, can be increased substantially acid will 1-4

Explanation / Answer

Ans 3 :

Whenever the reaction at equillibrium is subjected to any change in the reaction conditions , the reaction shifts in the direction where the equillibrium can be re-estabilished back.

So here :

A) Add HNO2 :

[HNO2] will : decrease

[H+] will : increase

[NO2-] will : increase

pH will : decrease

b) Add NaNO2

[HNO2] will : increase

[NO2-] will : decrease

[H+] will : decrease

pH will : increase

c) Add HCl

[HNO2] will : increase

[NO2-] will : decrease

[H+] will : decrease

d) Add H2O :

[HNO2] will : increase

[H+] will: decrease

[NO2-] will : decrease

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