What are the mortar and pestile used for in the lab procedure? When measuring ou

Question

What are the mortar and pestile used for in the lab procedure?

When measuring out the chemicals on the analytical balance, what must be done before each new weighing?

What property does weighing paper have that makes it better than another type of paper for weighing out the chemicals in this lab?

5.00 grams of calcium chloride are weighed out on the analytical balance with a clean, dry weighing paper. When transfered to the crucible a few tiny grains of chemical are left on the paper. The measurement of the weight of the crucible and CaCl2 will be

The clay triangle is not needed to heat the crucible. It's there because it makes the flame focus on the bottom of the crucible.

Very hot flame will cook the hydrated chemical too fast and can cause some decomposition with certain compounds. How would you adjust the experiment setup to keep the heat at the right level?

The triple beam balance is great for weighing if you aren't dealing with masses over 2,000 grams. Which of the following is another shortcoming of the triple beam balance?

If you detect an odor coming from the crucible, the best thing to do is turn off the heat and not open the cover until the sample has cooled.

1.

What are the mortar and pestile used for in the lab procedure?

purify the chemicals grind up the chemicals dehydrate the chemicals hydrate the chemicals magnetize the chemicals

Explanation / Answer

1. grind up the chemicals

2. Zero the balance (press the tare button).

3. very light

4. less than it should be

5. True

6. Do all of the above.

7. It is very hard to get more than a few digits of precision when reading the scale.

8. True

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