Advertisements
Advertisements
Question
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Advertisements
Solution
`"concentration" = "mass of solute"/"mass of solute+ mass of solvent"xx100 `
Given, Mass of salt is 2.5 gm and mass of water is 50 gm.
So, total mass of the solution = 50 gm + 2.5 gm = 52.5 gm
Hence, concentration `=2.5/52.5 xx 100 = 4.7%`
APPEARS IN
RELATED QUESTIONS
Define the following term of Matter .
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
What is meant by saying that metals are sonorous ?
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.
- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
One of the following represents the solution of solid in a solid. This one is :
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
One of the following does not undergo sublimation. This one is :
Which one of the following scrap metal cannot be separated by magnetic separation ?
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
A standard sheet of paper is about ______ of atoms thick
The most reactive metal is ______.
Which statement is not correct for a mixture
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
