A beaker containing salt solution and thistle with water sealed at its end with a semi permeable membrane, qhat gappend when the apparatus is assembled?

When the apparatus is assembled, several things happen:

1. Diffusion: The salt particles in the salt solution will start to move from an area of higher concentration (inside the beaker) to an area of lower concentration (outside the beaker). This movement is called diffusion, and it will continue until the concentration of salt is equal on both sides of the membrane.

2. Osmosis: The water molecules in the thistle tube will move from an area of lower concentration (inside the thistle tube) to an area of higher concentration (outside the thistle tube). This process is called osmosis, and it occurs because the semi-permeable membrane allows for the passage of water molecules but restricts the passage of larger salt particles.

3. Water level changes: As water moves out of the thistle tube through osmosis, the water level inside the thistle tube will gradually decrease. This is because the water molecules are moving to the area of higher concentration (outside the thistle tube), and as a result, the solution in the thistle tube will become more concentrated.

Overall, the salt solution in the beaker will gradually become diluted as water from the thistle tube moves out through the semi-permeable membrane, and the level of water in the thistle tube decreases.