Select every combination of chemicals that will produce a buffer when dissolved

Question

Select every combination of chemicals that will produce a buffer when dissolved in water.

1.0 moles of sodium acetate

1.0 moles of sodium acetate + 1.0 moles of potassium acetate

1.0 moles of sodium acetate + 1.0 moles of acetic acid

1.0 moles of sodium acetate + 1.0 moles of sodium hydroxide

1.0 moles of sodium acetate + 0.5 moles of sodium hydroxide

1.0 moles of sodium acetate + 1.0 moles of hydrochloric acid

1.0 moles of sodium acetate + 0.5 moles of hydrochloric acid

1.0 moles of sodium acetate

1.0 moles of sodium acetate + 1.0 moles of potassium acetate

1.0 moles of sodium acetate + 1.0 moles of acetic acid

1.0 moles of sodium acetate + 1.0 moles of sodium hydroxide

1.0 moles of sodium acetate + 0.5 moles of sodium hydroxide

1.0 moles of sodium acetate + 1.0 moles of hydrochloric acid

1.0 moles of sodium acetate + 0.5 moles of hydrochloric acid

Explanation / Answer

buffers :

1 ) 1.0 moles of sodium acetate + 1.0 moles of potassium acetate

2) 1.0 moles of sodium acetate + 1.0 moles of acetic acid

3) 1.0 moles of sodium acetate + 0.5 moles of hydrochloric acid

explanation:

buffer is the mixture of strong weak acid and its conjugate base. both should be present.

suppose : in the given above 1.0 moles of sodium acetate + 1.0 moles of hydrochloric acid

sodium acetate is a base it completely react with HCl . so only CH3COOH will form . so it should not buffer

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