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3 years ago

How many hydrogen atoms are in representative particle of each substance?Al(OH)3

Chemistry

1 answer:

Drupady [299]3 years ago

3 0

Answer:

There are 3 hydrogen atoms in the representative particle of Al(OH)₃

Explanation:

Al(OH)₃ is the chemical formula for the representative particle of aluminum hydroxide.

Since Al (aluminum) has not any subscript associated, it is understood that there is 1 atom of aluminum in each representative particle of Al(OH)₃.

Since the subscript 3 is after a parenthesis, it affects all the atoms that are inside such parenthesis. This leads to:

- there are 3 atoms of oxygen in each representative particle of Al(OH)₃, and

- there are 3 atoms of hydrogen in each representative particle of Al(OH)₃.

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According to the following reaction, how many grams of potassium sulfate will be formed upon the complete reaction of 23.8 grams

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Answer: The mass of potassium sulfate that can be produced is 73.88 grams

Explanation:

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

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

For KOH:

Given mass of KOH = 23.8 g

Molar mass of KOH = 56.1 g/mol

Putting values in equation 1, we get:

$\text{Moles of KOH}=\frac{23.8g}{56.1g/mol}=0.424mol$

The chemical equation for the reaction of KOH and potassium hydrogen sulfate follows:

$KHSO_4+KOH\rightarrow K_2SO_4+H_2O$

As, potassium hydrogen sulfate is present in excess. It is considered as an excess reagent.

KOH is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of KOH produces 1 mole of potassium sulfate

So, 0.424 moles of KOH will produce = $\frac{1}{1}\times 0.424=0.424moles$ of potassium sulfate

Now, calculating the mass of potassium sulfate from equation 1, we get:

Molar mass of potassium sulfate = 174.26 g/mol

Moles of potassium sulfate = 0.424 moles

Putting values in equation 1, we get:

$0.424mol=\frac{\text{Mass of potassium sulfate}}{174.26g/mol}\\\\\text{Mass of potassium sulfate}=(0.424mol\times 174.26g/mol)=73.88g$

Hence, the mass of potassium sulfate that can be produced is 73.88 grams

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