Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
(a) No, Sarika has a higher mass percentage.
(b) Solution made by Ramesh
Mass % = `10/(10 + 100) xx 100`
= `10/110 xx 100`
= 9.09%
Solution made by Sarika -
Mass % = `10/100 xx 100`
= 10%
APPEARS IN
संबंधित प्रश्न
Write the steps you would use for making tea. Use the words: solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.
Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).
| Substance dissolved | Temperature in K | ||||
| 283 | 293 | 313 | 333 | 353 | |
| Solubility | |||||
| Potassium nitrate | 21 | 32 | 62 | 106 | 167 |
| Sodium chloride | 36 | 36 | 36 | 37 | 37 |
| Potassium chloride | 35 | 35 | 40 | 46 | 54 |
| Ammonium chloride | 24 | 37 | 41 | 55 | 66 |
- What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K?
- Pragya makes a saturated solution of potassium chloride in water at 353 K and leaves the solution to cool at room temperature. What would she observe as the solution cools? Explain.
- Find the solubility of each salt at 293 K. What salt has the highest solubility at this temperature?
- What is the effect of change of temperature on the solubility of a salt?
Explain the following giving an example.
Saturated solution
Explain the following giving an example.
Suspension
Define the term solution.
Give an example of gas in gas.
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?
______ is the major difference between true solutions, suspensions, and colloids.
What is the solvent?
