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Given the reaction:
2NaOH + H2SO4 → Na2SO4 + 2H2O
What is the total number of moles of NaOH needed to react
completely with 2 moles of H2SO4?
1-0.5
2-2
3-4
4-1

Sagot :

Ardni313idn

The total number of moles of NaOH needed to react : 4

Further explanation

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

4 moles of sodium hydroxide is needed to react completely with 2 moles of sulfuric acid.

What is moles?

Moles of any substance gives idea about the amount of that substance and in 1 mole of substance 6.022×10²³ atoms of that substance.

Given chemical reaction is:
2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

From the stoichiometry of the reaction, it is clear that:

1 moles of H₂SO₄ = react with 2 moles of NaOH

2 moles of H₂SO₄ = react with 2×2=4 moles of NaOH

Hence, option (3) is correct i.e. 4 moles of NaOH is needed.

To know more about moles, visit the below link:
https://brainly.com/question/15263827

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