The total number of moles of NaOH needed to react : 4
<h3>Further explanation</h3>
Given
Reaction
2NaOH + H2SO4 → Na2SO4 + 2H2O
Required
moles of NaOH
Solution
The chemical reaction coefficient shows the mole ratio of the components of the compounds involved in the reaction, either in terms of reactants or products
From the equation, mol ratio of NaOH and H2SO4 : = 2 : 1, so mol NaOH :
= 2/1 x mol H2SO4
= 2/1 x 2 moles
= 4 moles
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2.5 , The reaction is
2K+Cl2=2KCl
Thus the number of moles of potassium and potassium chloride is same