Assume that the chemical reaction shown started out having a total of 15g of potassium and water How much potassium hydroxide and hydrogen gas will be produced by the chemical reaction? Show your work

The mass of KOH and H2 are 21.56 grams and 0.386grams

Given the balanced chemical reaction between potassium and water is given as;

Get the number of moles of potassium.

Based on stochiometry, 2 moles of potassium produces 2 mols of KOH and 1 mole of hydrogen gas.

Number of moles of KOH  = 0.38 moles

Number of moles of H2 = 0.385/2 = 0.193 moles

Get the mass of KOH

Get the mass of hydrogen

Hence the mass of KOH and H2 are 21.56 grams and 0.386grams

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Given :

15 g of potassium react with water .

To Find :

How much potassium hydroxide and hydrogen gas will be produced by the chemical reaction .

Solution :

Balanced chemical equation is given by :

Number of moles of potassium are :

From the chemical equation we can see that 1 mole of potassium produce 2 moles of KOH and 1 mole .

So , 0.38 mole of potassium will produce :

Mass of KOH produced , .

Mass of produced , .

Therefore , mass of potassium hydroxide and hydrogen gas produced is 42.56 g and 0.76 g respectively .

the answer is option a.