Chemistry, asked by Kant09, 7 months ago

Show how to prepare 150 grams of solution which is 7.5% NaCl by weight concentration.

a. what weight of Solute is needed? (show computations)

Answers

Answered by kumarirprasanna7
0

Answer:

The mass of NaCl needed for the solution is:

150g\times0.075=11.3g150g×0.075=11.3g

Therefore, the mass of water is 150g-11.3g=138.7g150g−11.3g=138.7g.

Assuming that the density of water is equal to 0.9982g/mL0.9982g/mL at 20oC, the volume of water needed is V=\frac{138.7g}{0.99982g/mL}=139mLV=

0.99982g/mL

138.7g

=139mL

So, in order to prepare this solution, 11.3 g of NaCl should be weighted and added to 139 mL of pure water.

Similar questions