Question

A solution contains 20 g of copper in 180 g of water. What will be the concentration in term of w/w?​

Answer 1

Answer:

A solution contains 20g of sugar dissolved in 180g water calculate the concentration in tems of mass by mass percentage of solution.

Ans. Sugar dissolves = 20g

Water ( Mass ) = 180g

.°. Total Mass Of The Solution= 180g + 20g

= 200g

Therefore, mass by mass percentage of the solution = Mass of the solute / Total mass of the solution × 100

i.e, 20/200 × 100

=10% Ans.

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Answer 2

Given:

Mass of copper, w = 20 gm

Mass of water = 180 gm

To Find:

The concentration in terms of Mass Percentage (w/w).

Calculation:

- The total mass of solution, W = 20 + 180 = 200 gm

- The mass percentage is given as follows:

Mass percent of copper = (w/W) × 100

⇒ Mass % = (20/200) × 100

⇒ Mass % = 10 %

- So, the Mass percentage (w/w) of copper in the given solution is 10%.