Tax rses/1255356/quizzes/1753078/take This quiz covers the content from Sections

Question

Tax rses/1255356/quizzes/1753078/take This quiz covers the content from Sections 16.10 to 16.11, and review for Test 2. There are ten questions in this quiz with 1 point for each. You have two attempts to finish the entire quiz. The higher score will be posted on Canvas once the quiz is closed. There is no time limit for each attempt. The quiz will be closed on Wednesday, March 28th, at 11.30 PM. The correct answers will be available on Wednesday, March 28th,at 11:35 PM D Question 1 1 pts List the following acids in order of increasing strength: Hl, H2S, HBr and HCI 1 pts D Question 2 Based on their molecular structure, pick the stronger acits from the pair of oxyacids and the correct reasoning.

Explanation / Answer

HI, HCl, HBr,H2S

Lets consider the halogen group first :

HI, HCl, HBr :

As we go down the group the size between the atoms H and halogen increase resulting in instability of the bond and it is easily broken into H+ and X-. So HI can generate H+ very easily.

So the order becomes : HCl< HBr< HI

Now, consider H2S : generates an unstable conjugate base- HS- upon dissolution, hence it is cosidered to be weakly acidic.

Overall order becomes : H2S < HCl < HBr < HI

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