Which liquid is the best solvent for salt?

Here are the solutions to the questions:

Question 3: Complete the table below by stating one source and one function of each.

Class of Food	Source	Function
Water	Drinking water, fruits, vegetables	Regulates body temperature, transports nutrients
Protein	Meat, fish, eggs, beans, nuts	Growth and repair of tissues, enzyme production

Question 4: The diagrams below are scientific apparatus. Study them and answer questions.

• a) Name the apparatus shown in the diagrams above, and state one use of each.

  • i. Apparatus: Thermometer Use: To measure temperature.
  • ii. Apparatus: Beaker Use: To hold and mix liquids, or to measure approximate volumes.

• b) Some common substances were added to three liquids (water, kerosene, alcohol) shown in the table below. Use it to answer question 4. b(i) and b(ii).

  Substance	Water	Kerosene	Alcohol
  Salt	soluble	insoluble	insoluble
  Sugar	soluble	insoluble	soluble
  Iodine	insoluble	soluble	soluble

  • i) Name the substance that can dissolve in both water and alcohol. Based on the table, Sugar is soluble in both water and alcohol.

    $$\boxed{\text{Sugar}}$$

  • ii) Which liquid is the best solvent for salt? Based on the table, Salt is soluble in water but insoluble in kerosene and alcohol. Therefore, water is the best solvent for salt among the given options.

    $$\boxed{\text{Water}}$$