Introduction: The purpose of the experiment was to determine if a lighter concentration of salt would diffuse faster than a lower concentration in an equal amount of water. If the salt concentration is higher then it will diffuse faster because it should reach equilibrium faster. The salt bag dissolving into the waiter in an example of hypertonic osmosis. The water is moving into the membrane to dissolve the salt.

Materials:
• 2 beakers with 200ml of distilled water
• 2 permeable membranes (bags)
• 8 grams of salt
• 1 graduated cylinder
• 1funnel
• 2 Total dissolved solids meter (TDS)
• 1 pair of safety glasses
• 1 digital scale
• 1 timer
• 4 strands of string
Procedure:
• Gather materials.
• Place 200ml water in each beaker.
• Prepair membrane.
-soak in water.
-blow in opening.
-tie one end with string.
• Add 20ml of water to each bag.
• Weigh salt, add five grams to one bag and three to the other.
• Tie the ends with string.
• Record TDS of water in the beaker.
• Start experiment:
-Place salt bags into the beakers and start timer.
• Record TDS every minute for five minutes
Data/Observations:
There were no visual observations of changes in the beakers.

Discuss/Conclude: The hypothesis was correct. The beaker with I higher concentration of salt diffused faster as indicated by the higher TDS reading after five minutes, It was almost twice as much TDS than the other beaker. The TDS of the water before the salt was added should have been the same. The 3 gram sample started at a higher TDS than the 5 gram. This reading anomaly caused the graph to be off. Next time I will thoroughly wash the beaker before using. This way there will be no left over particles from other experiments.

Connections: If I was in a hurry to make my lunch and my recipe called for two tablespoons of salt, I would add it all at once so it would go faster.