Buffer solutions

Henny987

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An alkaline buffer solution is made up of a base and the salt of the base - the pH of the mixture should be above 7.

So why does a mixture of sodium hydroxide and sodium chloride not make a buffer solution with pH above 7
BUT
ammonia and ammonium chloride does????

I got this knowledge from a chem alevel MCQ question that said: Which of the following solutions, when mixed, would make a buffer with pH more than 7? AND it was ammonia and ammonium chloride

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BobbJo

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(Original post by Mark jam)
An alkaline buffer solution is made up of a base and the salt of the base - the pH of the mixture should be above 7.

So why does a mixture of sodium hydroxide and sodium chloride not make a buffer solution with pH above 7
BUT
ammonia and ammonium chloride does????

I got this knowledge from a chem alevel MCQ question that said: Which of the following solutions, when mixed, would make a buffer with pH more than 7? AND it was ammonia and ammonium chloride

sodium hydroxide is a strong base, it ionises fully

for a buffer, you need a weak base + its conjugate acid or a weak acid + its conjugate base

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Henny987

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(Original post by BobbJo)
sodium hydroxide is a strong base, it ionises fully

for a buffer, you need a weak base + its conjugate acid or a weak acid + its conjugate base

Thanks!

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