Obememe

25.03.2021 • 

Chemistry

Help! 10 pts!! Lab Procedure
You MUST wear goggles at all times!!! Take your time on this
You will need: 10 household liquid samples and pH paper from K12 lab set
Find samples of solutions to test around your household.
For example: orange juice, lemon juice, cleaning solutions, milk, soda, water, detergent,
shampoo, soap, etc
1. Write down each of the samples in the data table below. Name specific brands
2. Make predictions of whether each sample will be acidic, basic, or neutral. Record these predictions in
the data table.
3. Get a well plate and collect 2-3 drops of each sample solution. Be sure to put each numbered sample
into the spot with the same number as the sample. Only place ONE sample in each spot. NEVER MIX
THE CHEMICALS!
4. Dip one of the small strips of pH paper into the first well. Pull the strip out immediately.
5. Count to 5 and then record the color of the paper in your data table compared to the color scale
6. Record the color and pH value of the paper in your data table
7. Repeat steps 4 - 7 for all of the solutions.
Solution
Name
(be specific)
Prediction
(Acid Base/Neutral)
Color
and
pH
Prediction
Correct?
(Y/N)
Actual
(Acid Base/Neutral)
1
2
I
3
4
5
6
7
8
9
10

Ответ:

crispymaddix12

27.09.2021

Chemistry

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Given mass of solute = 340 gram
Molar mass of solute(MgBr2) = 184 g

Number of moles = Given mass / Molar mass = 340 / 184 = 1.85 moles

Now, Molarity = Number of moles / solution (in litres)

So, M = 1.85 / 8
M = 0.23 M

In short, Your Molarity would be: 0.23 M

Hope this helps!

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