Question

1. What is the mass percent of the solute in the solution obtained by dissolving 5 g of the solute in 50 g of
water?
2- A sample of NaOH weighing 0.40 g is dissolved in water and the solution is made to 50.0 cm in volumetric
Rask. What is the molarity of the resulting solution?
3. How many moles and how many grams of sodium chloride (NaCl) are present in 250 cm? of 0.500 M
Naal solution?
4. Concentrated aqueous sulphuric acid is 98% H So, by mass and has a density of 1.84 cm. What
volume of the concentrated acid is required to make 5.0 litre of 0.500 M H SO, solution ?
5. How many grams of barium chloride (BaCl) are needed to prepare 100 cm of 0.250 M BaCl, solution ?
& How many moles and how many grams of sodium chloride (NCT) are present in 250 mL of a 0. SOM NICI
solution ?
7. A sample of NaNO, weighing 038 g is placed in a 500 ml measuring flask. The flask is then filled with
water upto the mark on the neck. What is the molarity of the solution 7
a reaction vessel, 184 g of NaOH is required to be added for completing the reaction. How many
millilitres of 150 M NaOH solution should be added for this requirement ?

Answer 1

Answer:

(1). The mass percent of solute in solution is 9.09 %.

Solution : Given,

Mass of solute = 5 g

Mass of solvent (water) = 50 g

First we have to calculate the mass of solution.

Mass of solution = Mass of solute + Mass of solvent

Mass of solution = 5 + 50 = 55 g

Now we have to calculate the mass percent of the solute in solution.

Mass % =

Now put all the given values in this formula, we get

Mass % =

Therefore, the mass percent of solute in solution is 9.09 %.