find the concentration if 35 g of salt is added to 300g of water

Dear Student,

Concentration of the Salt/Solute = Mass % of the Salt/Solute

And Mass % can be calculated by using the relation:

$\mathrm{Mass} \% \mathrm{of} \mathrm{the} \mathrm{Salt}/\mathrm{Solute}=\frac{\mathrm{Mass} \mathrm{of} \mathrm{Solute}}{\mathrm{Mass} \mathrm{of} \mathrm{Solution}}\times 100$

where,

mass of salt/solute = 35 gm
mass of solution = mass of salt/solute + mass of water/solvent
                           = 35 + 300
                           = 335 gm

$$\begin{gathered} \mathrm{Mass} \% \mathrm{of} \mathrm{Salt} = \frac{35}{335}\times 100 \\ \mathbf{Mass}\mathbf{ }\mathbf{\%}\mathbf{ }\mathbf{of}\mathbf{ }\mathbf{Salt}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{10}\mathbf{.}\mathbf{45}\mathbf{ }\mathbf{\%} \end{gathered}$$

Hope this information clears your doubts about the topic.

Keep asking!!

Regards