Question

Solutions of sodium hydroxide (volume = 90.0 mL) and nitric acid (volume = 95.0 mL) were mixed together in a neutralization reaction.

Calculate the mass of the combined solution.

We can assume the density of the solution to be the same as water, 1.00 g/cm3.

Give you answer to three significant figures.

Answer 1

Volume of Sodium Hydroxide $=90.0\ ml$

Volume of Nitric Acid$=95.0 \ ml$

Total Volume $=(90.0+95.0)\ ml=185\ ml$

Density of solution $= 1.00\ g/cm^3=1.00\ g/ml\ (\because 1 cm^3=1\ ml)$

Mass of solution will be $= V\times\rho=185\times 1.00 \ g= 185.00\ g$

$=185 \ g$ (In three significant figures)