Advertisements
Advertisements
Question
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
Solution
According to question-
21.5 g of NaCl dissolves in 60 g of water. So, amount of NaCl which gets dissolved in 100 g of water = 21.5 x 100 / 60 = 35.8 g
Thus, the solubility of NaCl is 35.8 g at 25oC.
APPEARS IN
RELATED QUESTIONS
Differentiate between an atom and a molecule.
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Explain why air is used to inflate tyres.
What is meant by saying that metals are lustrous ?
Name one element, one compound and one mixture.
The three important metalloids are.............................. and ..........................
Give reason why copper metal is used for making electric wires.
Name a metal which forms amalgams.
Out of a colloid, solution and a suspension :
which one has the largest particles ?
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
One of the following does not show Tyndall effect. This one is :
Name the process which can be used to purify an impure sample of copper sulphate.
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Pure copper sulphate can be obtained from an impure sample by the process of :
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Intermolecular space is maximum in ______.
Evaporation is always accompanied by ______ in temperature.
