Question

a solution contains 80g of common salt in 400g of water calculate the concentration in terms of mass by mass percentage of the solution

Answer 1

Answer:

Solute=80g

solvent=320g

solution=80+320=400g

concentration=mass of solute/mass of solution

=80/400

=0.2%

Explanation:

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Answer 2

Answer:

16.666%

Explanation:

Given:

400g of water and 80g of table salt make up the solution.

To find:

mass by mass percentage

Solution:

The mass percentage used to describe the solution composition indicates the mass of solute contained in a given mass of solution. The solute's concentration is specified in terms of mass or moles. The mass percent of a solution is calculated by multiplying the grammes of solute per gramme of solution by 100 to get the percentage.

Diverse approaches exist for expressing concentration. such as molality, part per million, mass percentage, volume percentage, etc.

In particular, the mass percentage formula is used to express the mass of a solute or solution.

There aren't any cases where only mass or volume applies.

Actually, it depends on the issue at hand.

If the mass of the solute, solvent, or solution is specified, we simply take it and compute.

We assess the phrases and amounts connected to molarity if they are supplied in molarity.

The mass of solute 80 g.

400g is the solvent's mass.

Solvent mass + solute mass = the mass of a solution.

= 80 + 400 =480 g

Thus the mass percentage of the solution is =

$\frac{mass\hspace{0.1cm}of\hspace{0.1cm}solute }{mass\hspace{0.1cm}of\hspace{0.1cm}solution} \times100\\=\frac{80}{480}\times100\\ =16.666\%$

The concentration of a solution by mass percentage is 4% and the mass of the solvent is 42g. Find the volume of the solution, if the density of the solution is 1.87g/mL.​

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