10: et lunior Colleg University of St. Fra. 19 Home Home 0/1.5 pts Question 7 Us

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10: et lunior Colleg University of St. Fra. 19 Home Home 0/1.5 pts Question 7 Using your knowledge of Le Chatelier's principle, at what pH values will the concentration of sulfide anions be largest? (Note that pH is a measure of the concentration of H,O cations; low pH- high H,0 molarities.) O Neutral Imedium) ph Low pH O The sulfide concentration will be the same at all pH values O High pH 0/1.5 pts Question 8 Which of the following can act as Lewis acids (electron pair acceptors)? O Water O Hydroxide anions Sulfide aniom O Metal cations Ammonia 1.5/1.5 pts Question S9

Explanation / Answer

7)

sulfide ions is S2- which is formed from H2S by deprotonation.

this deprotonation is possible at high PH.

because PH = - log [H+]

so with decreasing the [H+] and increasing the [OH-], H2S is deprotonated and sulfide ions remain in solution.

High PH is the answer.

8)

Lewis acid have vant orbital. For that Lewis acid can accept electrons.

Metal cations are electron defficient. so easily accept electrons.

Hence Metal cations is the answer.

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