Question

2. If a person cannot drink salt water, why can they drink sugar water? 3. Carrots were weighed, soaked in 4 different salt solutions and then re-weighed. Horace collected the weight changes (g) carefully: +2, -4,-1,0 Unfortunately, he forgot which weight change matched which salt solution. Predict which numbers should go where on the table below. Salt (g) added to 300 ml Weight change (g) water 10 20 5. In the table above, when the weight change is "O", the solutions on both sides of the plasma membrane are isotonic, meaning their solute concentrations are

Answer 1

3.

Every living organism’s salt content is controlled by osmotic factors. Through osmosis, water moves across an organism’s surface or membrane toward the saltier environment. Vegetables such as carrots and celery are crisp largely because of water (fresh water) trapped within them. So, if a carrot is placed in very salty water, it will be less salty than the water around it. This causes the water in the carrot to move out of the carrot and into the salt water. The result is that the carrot becomes limp and tastes saltier than before.

As the maximum water loss will be in the solution having the most amount of salt.

20 g salt in 300ml water the weight change is -4

10g salt in 300ml water the weight change is -2

5 g salt in 300ml water the weight change is 0 (Carrot has internal salt concentrations)

0g salt in 300ml water the weight change is -1

4.

Meaning their concentrations are EQUAL