Advertisements
Advertisements
Question
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
Solution
We will dissolve sodium chloride or NaCl in water in room temperature, till the water can no longer dissolve any more salt. By doing so, we will obtain a saturated solution of sodium chloride.
If the temperature is lowered from 25°C to 10°C, some of its dissolved solutes will get separated in the form of solute crystals due to the decrease in solubility of the solute.
APPEARS IN
RELATED QUESTIONS
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
Draw a flow-chart for the schematic representation of different types of matter.
Which of the following is not an element ?
Choose the correct answer.
A 5 per cent sugar solution means that :
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
Define Aerosol Give one example.
What is the difference between colloids and suspensions ?
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
How is cream separated from milk ?
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
The best way to recover sugar from an aqueous sugar solution is :
One of the following does not undergo sublimation. This one is :
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
______ is used for industrial refrigeration and transporting frozen food.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
