Question

To make a saturated solution 36g of sodium chloride is dissolved in 100g of water at 293 K . Find the concentration at this temperature.

Answer 1

Answer:

Given:

Mass of solute = 36 g

Mass of solvent = 100 g

Temperature = 293 K

To Find:

The concentration at this temperature

Solution:

Mass of solution = 36 g + 100 g = 136 g

According to the question,

We are asked to find the concentration.

Hence,

$\green{\boxed{\sf Concentration\;of\;solution = \dfrac{Mass\;of\;solute}{Mass\;of\;solution}}}$

$\implies \sf Concentration\;of\;solution = \dfrac{36}{136}$

$\implies \sf Concentration\;of\;solution = 0.2647$

$\pink{\rm In \;terms\;of\;percentage:}$

$\implies \sf Concentration\;of\;solution(\%) = 0.2647 \times 100$

$\implies \sf Concentration\;of\;solution = 26.47\;\%$

Answer 2

Answer: 26.47%.

Explanation:

Mass of solute = 36 g

Mass of solvent = 100 g

∴ Mass of solution = 36 + 100 g = 136 g

We know, w/w% of concentration = (Weight of solute)/(Weight of solution) 100%

So, w/w% = (36 g)/(136 g) = 26.47%.