Page 114 - Innovator's Science-8

The Amazing World of
9 Solutes, Solvents, and

Solutions

Intended Learning Outcomes
What Are Solute, Solvent, and Solu on? How Much Solute Can a Fixed
How does Temperature Affect the Amount of Solvent Dissolve?
Solubility of a Solute? Solubility of Gases
Why Do Objects Float or Sink in Water? What is Density?

Stepping Stones
1. What proper es of water make it an effec ve solvent for polar substances
like salt and sugar?
2. How can you increase the amount of sugar that dissolves in tea if it stops
dissolving?
3. What are the advantages of making water bo les in a cylindrical shape rather
than a round or spherical shape?

When you drink Oral Rehydration Solution (ORS), every sip tastes the same
because the sugar and salt dissolve completely and evenly throughout the

water. This creates a uniform mixture, meaning the components are spread
out evenly so no part tastes saltier or sweeter than another.
In contrast, when substances like chalk powder or sand are mixed with

Mixture of sugar, water, they do not dissolve and do not spread evenly, forming a non-
salt, and water uniform mixture where the parts remain separate. This is why ORS provides
consistent taste and helps your body absorb fluids and salts effectively

during dehydration.
In simple terms, sugar and salt dissolve in water to form a uniform mixture,
while chalk powder forms a non-uniform mixture with water because it

doesn't dissolve evenly. This property makes water an excellent solvent for
Mixture of substances like sugar and salt.
(a) Sand and water;
(b) Sawdust and water Let us explore the science of mixing things together.

WHAT ARE SOLUTE, SOLVENT, AND SOLUTION?

A uniform mixture like salt or sugar dissolved in water is called a solution . In
a solution, the substance that dissolves (such as salt or sugar) is called the

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Science-8