Concentrations: density, relative density, percentage, molarity, mass concentration

Tutorial 5

        

Use the following schematic "lattice" and →    the definitions to resolve the following exercise:

Exercise Calculate the mass of ammonia in $500;mL$ of a $4.76\%$ solution of density $0.978\frac{g}{mL}$. Solution (Click): Scheme and Formulas: .......... Calculation: ..........$m_{S}=\rho_{S}\cdot V_S$ $=$ $0.978\cdot 500=489\;g$
$m_{so}$ $=$ $\frac{m_S\cdot \%_{so} }{ 100}$ = $\frac{489\cdot4.76}{100}$ = $23.3 \; g$