Solubility and Dissolution Concepts

The video tutorial explains the concept of solubility, highlighting that it depends on the chemical makeup of substances. It describes an experiment to test the solubility of salt, sugar, chalk, starch, and baking powder in water. The results show that salt, sugar, and baking powder dissolve, while starch and chalk do not. The video concludes with an example using spinach and spinach juice to illustrate solubility differences.

What determines whether a substance is soluble or insoluble in a liquid?

• The chemical makeup of the substance

• The amount of liquid used

• The temperature of the liquid

• The color of the substance

Which of the following materials is NOT needed for the solubility test described?

• Sugar

• Salt

• Baking powder

• Vinegar

What is the first step in the solubility test procedure?

• Add substances to water

• Measure the temperature of the water

• Observe and note the colors of substances

• Stir the substances in water

Which substances were found to dissolve in water during the test?

• Salt, sugar, and chalk

• Chalk, starch, and salt

• Salt, sugar, and baking powder

• Sugar, starch, and baking powder

What texture is associated with substances that dissolve in water?

• Powdery and dry

• Crystalline and grainy

• Smooth and oily

• Sticky and wet

What characteristic is common among substances that do not dissolve in water?

• They are crystalline

• They are sticky

• They have a grainy texture

• They are powdery and dry

Why does spinach juice dissolve in water while spinach does not?

• Spinach is already dissolved

• Spinach juice is more colorful

• Spinach is too heavy

• Spinach juice is liquid and mixes evenly

What happens when you try to dissolve spinach in water?

• It dissolves completely

• It forms a paste

• It changes color

• Nothing happens