When measuring chemicals, you use a balance that can read to the nearest 0.1 gra

Question

When measuring chemicals, you use a balance that can read to the nearest 0.1 gram. A procedure says to measure a 5.0 gram increment of a salt. Which of the following could be the actual amount you weigh under the circumstances?

Would you say that salts cannot be measured to more than 2 digits after the decimal on even the most precise scales due to the size of salt crystals.

Weighing papers are used to measure chemical solids because most things don't stick to them, and they are lightweight and easy to handle. A deliquescent chemical is one that absorbs water and gets wet when exposed to the air. What effect might deliquescence have on weighing out chemicals on a weighing paper?

Which of the following is required when working with a hot crucible?

Which of the following issues might be avoided by keeping the flame of the bunsen burner at a reasonable level?

Cooling down the crucible before weighing it is good lab procedure

When assembling your ring stand, which of the following is not a good idea?

When measuring chemicals, you use a balance that can read to the nearest 0.1 gram. A procedure says to measure a 5.0 gram increment of a salt. Which of the following could be the actual amount you weigh under the circumstances?

Explanation / Answer

1) A procedure says to measure a 5.0 gram increment of a salt. Which of the following could be the actual amount you weigh under the circumstances?

Since the decimal is to 0.1 g then the second decimal will not count so the correct answer is 5.5 g

2) Would you say that salts cannot be measured to more than 2 digits after the decimal on even the most precise scales due to the size of salt crystals.

Answer is No

Because you can powder and weight so with a precise balance you should be able to weight to 3 or even 4 decimals

3) The amount weighted will be actually less than the weight since some amount of water have been absorbed so the right answer is

The amount weighed is light due to the addition of water from the air

4) When working with hot crucible the right approach is to use something to lift it ideally a tongs for better grip

Answer: tongs for moving the crucible

5) If you keep the flame of a bunsen burner high there is the possibility of the salt decomposing as the heat will be strong

Answer: decomposing the chemical salt

6) Cooling down is good because the weighing will be accurate as hot dishes should not be weight due to error is the initial weight condition

SO answer is True

7) The right answer is: Set the support ring below the top of the bunser burner height.

This is because if you do this you cannot place your crucible properly on the stand

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