I really need help with this question course contents Graded Assignment 9 1. Det

Question

I really need help with this question

course contents Graded Assignment 9 1. Determine the pH (to two decimal places) of the solution that is produced by mixing is 2 ml of g s6x10 M HBr with 740 mu af 2asx101 H Ha. Tries 2. Determine the pom (to two dedmal places) of the selution that Produced by ing 3.8 mL of 9.90x10 Mth 107 me at 5.88x10 4 M Submit Answer Tries ow 3 s) of the solution that is produced by mixinu 3e4 mL of y 7s*104M Determine the pH (to two decimal Submit Arswer Tries oW3 This discussion is closed.

Explanation / Answer

1.

These are strong acids

hence,

Moles of HBr = 18.2*10-3 L * 9.56*10-2 mol/L = 1.740*10-3 mol

Moles of HCl = 740*10-3 L * 2.05*10-1 mol/L = 0.1517 mol

Total moles of H+ = 1.740*10-3 + 0.1517 = 0.15344 mol

Total volume = 18.2 +740 = 758.2 mL = 0.7582 L

[H+] = 0.15344 / 0.7582 = 0.2024 M

pH= -log[H+] = -log0.2024 =0.69

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