Experiment: Part I

Hello there!!

Okay, so what we did today is the experiment:

Factors affecting the rate of a reaction.
Materials:
24-well test plate
HCl Solution
Water
Zinc Nitrate Solution
Iron Nitrate Solution
Acetic Acid
Copper Nitrate Solution
Toothpicks

And a few pieces of the following:
Magnesium
Aluminum
Zinc
Copper
Iron

Part I:
1.) Add 20 drops of 3.0 moL/L HCl Solution to each of five wells of the 24-well test plate.
2.) Place a small piece of Mg in the first well, a piece of Al in the second, a piece of Zn on the third, a piece of Fe in the fourth, and a piece of Cu in the fifth.
3.) Observe and Record your observations.
Questions:
1.) What gas is produced? How do you know?
2.) Write a balanced equation to represent the reaction.
3.) Do all the metals take the same time to react?
4.) Rank all the metals in order of reactivity.
4.) Add 13 drops of water and 7 drops of 3.0 mol/L HCl solution to one well. Use the toothpick to stir the solution.
5.) Add 13 drops of water and 7 drops of 3.0 mol/L Acetic Acid to a second well. Stir.
6.) Add 20 drops of 1.0 mol/L aqueous Zn(NO3)2 solution to a third well, 20 drops of 1.0 mL/L Fe(NO3)3 to a fourth well, and 20 drops of 1.0 mL/L Cu(NO3)2 to a fifth well.
7.) Place a small piece of Mg in each of the five solutions.
8.) Observe and Record your observations.
Questions:
1.) What happened in each test tube? I dentify the products in each case.
2.) Write a balanced equation to represent each reaction.
3.) How much time does the Mg take to react in each solution?

The next blogger is Angela!

Where is the Next Blogger?

Okay, so since no one is blogging....

I'll blog for today...

We had a test today(again..:-)) about:

Ternary Nomenclature: Acids and Bases
Solubility
Identification of Unknown Solutions
Equations: Ionic, Net Ionic
Concentration, Titration, Neutralization
Moles, Volume

Titrtation Lab

Hello...

Okay, so what we did today (and also learned) is the Titration Reaction (Lab. or Experiment...)

Titrations are procedures which are usually used to determine the unknown concentrations of substances . It is a common laboratory method of quantitative/chemical analysis that can be used to determine the unknown concentration of a known reactant. Because volume measurements play a key role in titration, it is also known as volumetric analysis. A reagent, called the titrant, of known concentration (a standard solution) and volume is used to react with a solution of the analyte, whose concentration is not known in advance. Using a calibrated burette to add the titrant, it is possible to determine the exact amount that has been consumed when the endpoint is reached. The endpoint is the point at which the titration is complete, as determined by an indicator.

THE EXPERIMENT
Materials: 1-50mL beaker
3 Micropipettes
Phenolphthalein Indicator
10 mL Graduated Cylinder
Distilled Water
0.1 mol/L NaOH
0.1 mol/L H2SO4


Procedures:

1.) Using the Graduated Cylinder and a micropipette, count and record the number of dropd required to obtain 1.0 mL of distilled water. REPEAT the process 3 TIMES.

2.) Add 5 mL of Distilled water, and 1 drop of Phenolphthalein Indicator to the 50 mL beaker.

3.) Using a 2nd micropipette, add 20 drops of 0.1 mol/L H2SO4 to the beaker.

4.) Using the 3rd micropipette, add the 0.1 ml/L NaOH drop by drop until the addition of one drop permanently changes the colour of the solution. Recprd the number of drops required to reach the endpoint of tartration.

5.) Rinse the contents of the beaker. "Repeat Steps 2-4 a total of 3 times!!!!"

The Next 'Blogger' is M:-)