Dilution and Filtration

Last week, in Science we talked about dilution and filtration. That's why we also look and experiment what will be the reaction when we use the cooper nitrate, then constantly putting 1ml of water on the test tubes. 

 Equipment- Test tube rack, 4 test tubes, pipette, the chemical solutions Copper Nitrate and Sodium Hydroxide

Method- Take 4 test tubes, in the first test tube measure and pour in 10ml of Copper Nitrate. Then take 1ml from the first test tube and pipette into the second test tube. Add 9ml of water to make it up to 10ml. Then repeat for the third and fourth test tubes. 

Making the precipitate- Now add 5ml of Sodium Hydroxide to each test tube and take a picture in front of white paper. 

Questions:

Which test tube had the most concentrated sample of Copper nitrate?

Ans: The first test tube, was the most concentrated because it has the most strongest colour and show the best reaction. Out of the rest because,the second test tube copper nitrate were fading away since we were diluting it by putting 9ml of water.

When we added water what were we doing to the concentration of the solution? 

Ans: So when we add the water we were diluting the copper nitrate, that's why it becomes more clearer when it comes to the last test tube.

Which concentration of copper nitrate formed the most precipitate, why do you think this is the case?

Ans: It is obviously the first one because it wasn't mixed with any chemicals, like water, etc. That's why it was the most blue.

Solvent: The substance in which the solute dissolves (liquid)

Solute : Substance being dissolved

Filtrate : A liquid which has passed through a filter.

Precipitate : Cause (a substance) to be deposited in solid form from a solution.