.500 g of a solid white acid are dissolved in water and completely neutralized by the...

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Answer 1

Answer #1

The balanced equation is
NaOH + HA ----------> H2O + NaA

Volume of NaOH = 21.00 mL = 0.021 L
Number of moles of NaOH = M*V = 0.300 M * 0.021 L = 0.0063 mol

According to balanced equation,
1 mole of NaOH reacts with 1 mole of HA
So, 0.0063 mol of NaOH would react with 0.0063 mol of HA

Number of moles of HA = 0.0063 mol
Mass of HA = 0.500 g

Molar mass of the acid = mass/moles = 0.500 g/ 0.0063 mol = 79.36508 g/mol

Molar mass of the acid = 79.37 g/mol

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Answer 2

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