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Question

Calculate the pH of mixture of 800 mL of 1100 M Ca(OH)2, 800 mL of 140 M HNO3 and 400 mL of water.

A
3.7
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B
2.7
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C
3
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D
3.2
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Solution

The correct option is B 2.7
[H+]=(800×140)(800×1100×2)2×103=42×103=2×103pH=log[H+]=log(2×103)
= 3 – log2 = 3 – 0.3 = 2.7

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