Question

what mass TiO2 needs to be dissolved in water to make 0.45 mL of a 0.700 M TiO2 solution

Answer 1

• Volume=0.45mL=0.00045L
• Molarity=0.7M

No of moles:-

$\\ \tt\Rrightarrow Molarity (Volume)$

$\\ \tt\Rrightarrow 0.00045(0.7)$

$\\ \tt\Rrightarrow 0.000315mol$

• Molar mass of TiO_2=79.866g/mol

Mass:-

• 0.000315(79.866)=0.025157779g