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Butoxors [25]
2 years ago
7

The ph of a 0.175 m aqueous solution of a weak acid is 3.52. what is ka for this acid?

Chemistry
1 answer:
Naddika [18.5K]2 years ago
3 0

Hey there!

pH = - log [ H⁺  ] = 3.52

[ H⁺ ] = 10^-pH

[ H⁺] = 10^ ( -3.52 )

[H⁺] = 3.02*10⁻⁴ M

[HA] =0.175 M

Therefore:

Ka = [ H⁺]* [A⁻] / [ HA]

Ka =  (3.02*10⁻⁴)² /  0.175

Ka = 9.1204*10⁻⁸ / 0.175

Ka = 5.2*10⁻⁷


Hope that helps!


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13. Which statement best describes an element? *
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Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.

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4 0
2 years ago
Which phrase is the best description of a topographic map? A shows the physical features of the land B shows political boundarie
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A shows the physical features of the land

Explanation:

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8 0
2 years ago
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A block of iron has a mass of 150 g and a volume of 20 ml. What is the density of iron? *
shtirl [24]

Answer:

<h3>The answer is 7.50 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

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We have

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We have the final answer as

<h3>7.50 g/mL</h3>

Hope this helps you

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2 years ago
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