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Natalka [10]
3 years ago
9

Solid added to liquid and the solid floats down to bottom of container physical or chemical change?

Chemistry
1 answer:
Makovka662 [10]3 years ago
4 0

Answer:

Physical change

Explanation:

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2 years ago
The acid-dissociation constants of HC3H5O3 and CH3NH3+ are given in the table below. Which of the following mixtures is a buffer
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A mixture of 100. mL of 0.1 M HC3H5O3 and 50. mL of NaOH

Explanation:

The pH of a buffer solution is calculated using following relation

pH=pKa+log(\frac{salt}{acid} )

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The pKa value of HC₃H₅O₃ acid is more closer to required pH = 4 than CH₃NH₃⁺ acid.

pKa = -log [Ka]

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For CH₃NH₃⁺

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A mixture of 100. mL of 0.1 M HC3H5O3 and 50. mL of NaOH

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