Question

1.

Identify colloids and true solutions from the following:

Pond water, fog, aluminium paint, vinegar and glucose solution.

2. State the principle of Centrifugation technique.

3. A solution has been prepared by mixing 5.6 mL of alcohol with

75 mL water. Calculate the percentage (by volume) of alcohol in the

solution Cab anyone answer fast armys pleas answer this if u know​

Answer 1

Answer:

1. True solutions- Vinegar, glucose solution

  Colloids- Fog, Aluminium paint

2. Principle of Centrifugation : Denser particles are forced to the bottom and the lighter particles stay at the top when spun rapidly.

3. Volume of alcohol = V₁ = 5.6 mL

   Volume of water = V₂ = 75 mL

   ∴ The total volume of the solution

       = V₁ + V₂

       = (5.6 + 75) mL

       = 80.6 mL

    Now, percentage of alcohol in the solution

    = [(Volume of alcohol, V₁ / Total volume of the solution) × 100]

    = (5.6/80.6) × 100

    = 0.069 × 100

    = 6.9 %

Hope you understood.

Thank You.