Question

A student crushed the piece of chalk and mixed the chalk powder in 100ml of water. The water appeared white and cloudy. After sometime the particles settled at the bottom of the container. She claims the mixture as suspension. What justifies her claim? (1 Point) a) The particles mix completely with water b) The particles of chalk form a separate layer c) The particles of chalk are visible through the naked eye d) The particles of chalk are uniformly distributed in water

Answer 1

Answer:

1. No,2.No,3.No,4.No

Explanation:

1. Chalk's main component is CaCO3 , calcium carbonate. The solubility of calcium carbonate is extremely low in water, so therefore an extremely minute amount of CaCO3 is able to dissolve in a normal amount of water. The rest would remain solid, classifying it as mostly insoluble in water.
2. It will not completely dissolve ,some particles were on suspension.
3. Suspension are heterogeneous mixture.In this, mixture the solute particles are visible to naked eye and remain suspended to the bulk of medium
4. Solute particles are uniformly distributed through out the solvent but chalk powder in water is insoluble and not uniformly distributed throughout the water.
5. May it helps youuuu

Answer 2

The correct option is- c) The particles of chalk are visible through the naked eye.

• The mixture of chalk powder and water forms a suspension after sometime because the particles of chalk settle at the bottom of the container that is easily visible through the naked eye.
• Besides this, a mixture is also called suspension when it is not equally distributed and it has a solid phase not dissolved in liquid phase. Here, the chalk powder is a solid phase and water is a liquid phase. Hence, forms a suspension.