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3 years ago

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Enough of a monoprotic acid is dissolved in water to produce a 0.0142 M solution. The pH of the resulting solution is 2.58. Calc

ulate the Ka for the acid.

1 answer:

Mekhanik [1.2K]3 years ago

6 0

Answer:

Ka = 4.9 x 10ˉ⁴

Explanation:

HOAc ⇄ H⁺ + OAcˉ

Ka = [H⁺][OAcˉ]/[HOAc]

Given pH = 2.58 => [H⁺] = [OAcˉ] = 10ˉ²∙⁵⁸ = 2.63 x 10ˉ³M

Ka = (2.63 x 10ˉ³)²/(0.0142) = 4.9 x 10ˉ⁴

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Independent would be the amount of sugar given and the dependent would be the amount of cavities

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A chemist prepares a solution of aluminum sulfate (Al2(SO4) by weighing out 116.0 g of aluminum sulfate into a 450. mL volumetri

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Answer:

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Explanation:

Mole -

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

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m = molecular mass .

From the information of the question ,

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Molarity -

Molarity of a substance , is the number of moles present in a liter of solution .

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From the information of the question ,

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Since,

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As, the unit asked in the question is in dL,

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3 years ago