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Weighing Balances in Pharmaceutics Quiz

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Questions and Answers

What is the maximum capacity of general-purpose balances used in pharmaceutics?

100 g

300 g (correct)

0.01 g

0.0001 g

In what conditions are analytical balances likely to be found?

Open laboratory with vibrations

With frequent manual adjustments

On a draught-free surface (correct)

Highly sensitive to external factors

What is the weighing precision of analytical four-figure balances?

0.01 mg

0.1 mg (correct)

1 g

10 g

What feature of general-purpose balances allows the automatic subtraction of the container's mass?

Electronic zero facility (self-taring) (D) Signup and view all the answers

What is a key maintenance aspect of analytical balances according to the text?

No need for any user adjustments like levelling or zero adjustment (D) Signup and view all the answers

What factors determine the weighing container to be used for chemicals?

The amount of chemical to be weighed and its properties (B) Signup and view all the answers

Which type of weighing containers should be used for analytical procedures in pharmacy?

Weighing boats, weighing bottles, glass, or plastic sample tubes (D) Signup and view all the answers

When is it recommended to use weighing boats to transfer a solid into a volumetric flask?

When the solid is known to be totally soluble in the solvent (D) Signup and view all the answers

What should be considered when deciding on the weighing container according to the text?

The accuracy to which the chemical is to be weighed (A) Signup and view all the answers

Why are special glazed paper containers mentioned in relation to weighing containers?

As an alternative to glass weighing boats (C) Signup and view all the answers