Question

Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flowers, soil, copper sulphate crystals, glucose, wheat flour and some substance given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.

Answer 1

Water which is also known as hydrogen hydroxide, is an inorganic, transparent, tasteless, odorless and nearly colorless substance. It is important for all known organisms living on the earth.

Complete Step by step solution:
A mixture of two or more substances where one or more solutes are dissolved uniformly in a solvent is known as solution. A solution is a homogeneous mixture. The substance which gets dissolved in a solvent is known as a solute. A liquid that can dissolve a substance or a solute in it, is known as a solvent.
The substances which possess the ability to get dissolved in a particular solvent are known as soluble substances with respect to that solvent. The substances which do not possess the ability to get dissolved in a particular solvent are known as insoluble substances with respect to that solvent.
As water is a good polar solvent, it is considered as an universal solvent. Hence water will be able to dissolve most of the solutes.
From the given substances; sugar, salt, honey, glucose and copper sulphate crystals are the substances which can dissolve in water.
From the given substances; mustard oil, sand, sawdust, chalk powder, petals of flower, soil and wheat flour are the substances which cannot dissolve in water.

Note:
The factors that contribute in the ability of dissolving a substance are temperature, size, chemical nature and sometimes pressure. When a solid changes to a liquid state of matter, it can also be known as dissolving. Dissolving is a physical process.