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Author Question: You have 100.0 mL of 0.100 M aqueous solutions of each of the following acids: HCN, HF, HCl, and ... (Read 97 times)

bobbie

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Question 1

You dissolve 1.25 grams of an unknown diprotic acid in 200.0 mL of H2O. This solution is just neutralized by 5.00 mL of a 1.00 M NaOH solution. What is the molar mass of the unknown acid?

250
125
31.3
500
None of these are correct.

Question 2

You have 100.0 mL of 0.100 M aqueous solutions of each of the following acids: HCN, HF, HCl, and HC2H3O2. You titrate each with 0.100 M NaOH (aq). Rank the pHs of each of the solutions when each are titrated to the equivalence point, from highest to lowest pH.
 
Ka for HCN = 6.2 × 10–10
 
Ka for HF = 7.2 × 10–4
 
Ka for HC2H3O2 = 1.8 × 10–5
 


HCN, HC2H3O2, HF, HCl
HCl, HF, HCN, HC2H3O2
HF, HCN, HC2H3O2, HCl
HC2H3O2, HCl, HCN, HF
None of these are correct.


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Marked as best answer by bobbie on Mar 21, 2021

ansleighelindsey

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bobbie

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Reply 2 on: Mar 21, 2021
:D TYSM


phuda

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Reply 3 on: Yesterday
Gracias!

 

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