Advertisements
Advertisements
प्रश्न
Arun has prepared a 0.01% (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions?
विकल्प
1.00 g of NaCl + 100g of water
0.11g of NaCl + 100g of water
0.0l g of NaCl + 99.99g of water
0.10 g of NaCl + 99.90g of water
Advertisements
उत्तर
0.0l g of NaCl + 99.99g of water
Explanation:
Mass % = `(Mass of solute)/(Mass of solute + Mass of solvent) xx 100`
(a) Mass percentage = `1.00/(1.0 + 100 xx 100)`
= 0.99
(b) Mass percentage = `0.11/(0.11 + 100) xx 100`
= 0.1098
(c) Mass percentage = `0.01/(0.01 + 99.99) xx 100`
= 0.01
(d) Mass percentage = `0.10/(0.10 + 99.90) xx 100`
= 0.1
APPEARS IN
संबंधित प्रश्न
Identify the solutions among the following mixtures.
- Soil
- Sea water
- Air
- Coal
- Soda water
Explain the following giving an example.
Suspension
Give an example of a solid in a liquid.
Give an example of solid in solid.
Give an example of gas in gas.
The teacher instructed three students ‘A’, ‘B’ and ‘C’ respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). ‘A’ dissolved 50g of NaOH in 100 mL of water, ‘B’ dissolved 50g of NaOH in 100g of water while ‘C’ dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?
Name the process associated with the following
A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.
Can a solution be heterogeneous?
During an experiment, the students were asked to prepare a 10% (Mass/Mass) solution of sugar in water. Ramesh dissolved 10g of sugar in 100g of water while Sarika prepared it by dissolving 10g of sugar in water to make 100g of the solution.
(a) Are the two solutions of the same concentration
(b) Compare the mass % of the two solutions.
What do you understand by the term solute with reference to a solution?
