Question

You calibrated a different pipet and determined its volume to be 24.50 mL. You then use it to determine the density of an unknown liquid. You use a fresh clean dry beaker with an initial mass of 49.0887 g. You pull the unknown liquid up to the mark in the pipet and transfer this to the beaker. The new mass of the beaker and liquid is 78.4382 g. What is the density of the unknown liquid?

Answer 1

The density of the unknown liquid, given the data is 1.2 g/mL

What is density?

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

How to determine the density of the unknown liquid

From the question given, the following data were obtained:

• Volume of unknown liquid = 24.5 mL
• Mass of beaker = 49.0887 g
• Mass of beaker + unknown liquid = 78.4382 g
• Mass of liquid = 78.4382 - 49.0887 = 29.3495 g
• Density of unknown liquid =?

Density = mass / volume

Density of unknown liquid = 29.3495 / 24.5

Density of unknown liquid = 1.2 g/mL

Thus, the density of the unknown liquid is 1.2 g/mL

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