Question

What is the mass by volume percentage if 23gm of glucose dissoved in

300ml of solution

a) 6.7 % w/v

b) 7.6% w/v

c) 8.3% w/v

d) 5.6% w/v
​

Answer 1

a)6.7%w\v

For a solution, the mass per cent is described as the grams of solute per grams of solution, multiplied by 100 to get the percentage. The Mass per cent formula is expressed as solving for the molar mass also for the mass of each element in 1 mole of the compound.

To work out how much glucose you need to make a solution of a given percent, multiply (mass/volume) by volume, bearing in mind that 1 g in 100 ml is a 1 percent solution. For this example, if you want to make a total solution of 500 ml of 20 percent glucose, multiply (20/100) by 500.

To make 100 ml of 1% sucrose, one would pipette 10 ml of stock 10% sucrose into a 100 ml volumetric flask, and bring the total volume to 100 ml with water. Dilution of stock solutions is simply a more convenient may of making up variations of solution concentrations than weighing out the chemical each time.

Mass/Volume Percent: Another version of a percentage concentration is mass/volume percent, which measures the mass or weight of solute in grams (e.g., in grams) vs. ... The mass/volume percent is used to express the concentration of a solution when the mass of the solute and volume of the solution is given.

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Answer 2

Answer :

Mass of glucose = 23g

Volume of solution = 300ml

We have to find mass by volume percentage of the solution$.$

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◈ Mass by volume percentage concentration of solution is defined as the ratio of amount of solute in grams dissolved in 100mL of the solution.

ATQ,

Mass of solute = 23g

Volume of solution = 300mL

➝ %w/V = 23×100/300

➝ %w/V = 23/3

➝ %w/V = 7.67%