Separation of Saltwater Solution.

Week 1

Separation of Saltwater Solution.

BIOS-135

Foundation of Biology & Chemistry with Lab

Separation of Saltwater Solution

Introduction:

We going to separate the water (H2O)from the salt (NaCl), using all the equipment necessary , like the beaker 250 ml the electronic scale, thermometer and the burner, making evaporated the water and taking the weight of the salt.

Purpose:

With a mix of salt water we going to evaporated the water and keep the salt and take the weight, so we get more familiarized to the lab tools.

Background:

In the lab we make the brake of the water and the NaCl , we have to take some measure after and before so we can compare our results and state the % of mass of water evaporated and the weight o salt in the beaker.

Findings:

What we learn is the used of the electronic scale, and the weight of the 250 ml beaker is 75 g and we add salt water and the weight go to 95g, we applied heat to make the water boil and 103 c,

water evaporated and we keep in the beaker 10 mg of salt and the other 10 mg of water is gone in the process of evaporation.

Procedure:

If you want to do the same like us, just follow this procedure: you have to obtain an electronic balance, obtain a 250 ml beaker, have to weigh dry 250 ml beaker and record weight (75.000 g),place the beaker on the balance and take the mass in grams ,add 10 ml of water and salt , I just add 10 ml of water and 10 g of salt making a salt water , I can follow the recommendation from the procedures with the unknown salt solution because can make the unknown get to 10 ml,

With all this water and salt the beaker go to 95g , applied heat to the beaker until reach evaporation of the water 100.00 -103.00 c ,record temperature, when you see two bouncing spheres take the heat out and wait until cool to 20 degrees Celsius and weigh the beaker the result is the salt in the beaker.

Observations and Results:

We have the beaker 75 g + 20 g of salt solution plus 103 c of heat...