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3 years ago

9

According to the Arrhenius definitions of acids and bases, choose the acids from the list of acids and bases. Check all that app

ly.
HBr

Sr(OH)2

HClO

H2S

LiOH

1 answer:

ANEK [815]3 years ago

8 0

Answer:

The answers are:

HBr

HClO

H2S

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The weak acid HA is 5 % ionized (dissociated) in a 0.35 M solution.

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scZoUnD [109]

<u>Answer:</u> The mass percent of potassium bromide in the mixture is 9.996%

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

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Given mass of lead (II) bromide = 0.7822 g

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Putting values in equation 1, we get:

$\text{Moles of lead (II) bromide}=\frac{0.7822g}{367g/mol}=0.0021mol$

The chemical equation for the reaction of lead (II) nitrate and potassium bromide follows:

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By Stoichiometry of the reaction:

1 mole of lead (II) bromide is produced from 2 moles of potassium bromide

So, 0.0021 moles of lead (II) bromide will be produced from = $\frac{2}{1}\times 0.0021=0.0042mol$ of potassium bromide

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Putting values in equation 1, we get:

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