100 ml of 0.2 M HCl reacts with sodium hydroxide solution is completely. THe mass of NaOH reacted is
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Given: 100 ml of 0.2 M HCl reacts with sodium hydroxide solution completely.
To find: Mass of NaOH reacted
Explanation: When two compounds react completely, the number of moles of both of them are equal.
Molar mass of NaOH= 40g / mol
Volume of HCl= 100mL = 0.1 L
Moles of HCl = Molarity * Volume (in L)
= 0.2 * 0.1
= 0.02
Therefore, the moles of NaOH reacted is also equal to 0.02
Moles of NaOH= mass reacted/ molar mass
=> mass reacted= molar mass * moles of NaOH
= 40 g/mol * 0.02 mol
= 0.8 g
Therefore, the mass of NaOH reacted is 0.8 grams.