Question

Write 5 things which dissolve in water and which do not dissolve in water ​

Answer 1

Answer:

Things like salt, sugar and coffee dissolve in water. They are soluble. They usually dissolve faster and better in warm or hot water. Pepper and sand are insoluble, they will not dissolve even in hot water.

Answer 2

Answer:

Do not dissolve in water: Sand, oil, vinegar, plastic and soil

Dissolve in water: Salt, sugar, coffee, milk and food colors

Explanation:

Water is polar in nature  and is considered a universal solvent.

• Polar molecules of water are positively charged at one end and negatively charged at another end. So molecules of water remain intact when interacted with non-polar molecules.
• It readily dissolves ions and polar molecules.

• Polar molecules only dissolve in polar solvents and non-polar molecules only dissolve in non-polar solvents.

• Salt, sugar, coffee, milk and food colors either have polar molecules or hydrophilic molecules and can dissolve in water.

• Sand, oil, vinegar, plastic and soil have non-polar or hydrophobic molecules and do not dissolve in water.

• However, with the help of an emulsifier, it might be possible to force water and oil to mix together.