Question

The diagram below shows two solutions which have been placed in a glass beaker.
They are separated by a partially permeable membrane. In compartment A there is a
concentrated sucrose solution. In compartment B there is an equal volume of distilled
water.
(a) Draw an arrow on the diagram to show which direction you would expect water
molecules to move i.e from A to B or from B to A. [1]
(b) What is this movement of water molecules called?

Answer 1

Understanding the concept :

1. Here two solution are seperated by partially permeable membrane .
2. Solution A, has water as solvent and sucrose as Solute
3. Solution A is concentrated (has more amount of sucrose)

ANSWER :

(a) For arrows refer to attachment.

As Solution A is more concentrated than solution B , water from solution B will move to Solution A ( till the concentration became equal in both)

(b) Movement of water is called Osmosis.

Osmosis is defined as movement of water from low Solute concentration to higher concentrations seperated by semi-permeable/partially permeable membrane.