What is the pH of household ammonia? If you were to dilute it 100 times with dis

Question

What is the pH of household ammonia? If you were to dilute it 100 times with distilled water would you expect its pH to increase, decrease or not change? Explain your answer based on the definition of pH. 5. 6. Household ammonia and vinegar are commonly used as cleaning agents. a) Explain why each is effective as a cleaning agent for the type of dirt or grime it is used for. If you were to mix vinegar and household ammonia, would the mixture be effective as a cleaning solution? Explain why or why not. b)

Explanation / Answer

5. pH of household ammonia is 11.

As we know , pH = -log[H+] and  pOH = -log[OH-]

then, at pH = 11, pOH = 14-11= 3, ( As pH +pOH = pkw =14)

-log[OH-] = 3, [OH-] = 10-3 mol/L,

if we dilute it 100 times , [OH-] = 10-5 mol/L

hence, pOH = -log[OH-] = -log10-5 = 5

or pH = 14 - 5 = 9

Therefore if we dilute it 100 times pH of the solution will decrease by two.

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