6.1.9. Weighing Balance

Try these first

1. 1.

   What does a weighing balance measure?

   Hint

   Think about what we call this quantity that we measure.

2. 2.

   What is the formula for concentration?

   Hint

   Recall how we describe concentration in science.

3. 3.

   What is the primary function of a weighing balance?

   • To measure volume
   • To measure mass
   • To measure temperature

   Hint

   Think about what 'weight' refers to in physics.

4. 4.

   True or False: Sensitivity of an instrument is defined as its ability to measure large quantities accurately.

   • True
   • False

   Hint

   What do we mean by 'detecting' in measurements?

5. 5.

   A laboratory wants to ensure the precision of their weighing balance. They measure a 50-gram sample three times and get 50.1g, 49.9g, and 50.0g. Discuss the precision and provide statistical tools to evaluate it.

   Hint

   What formulas can help you calculate the spread in your data?

6. 6.

   Discuss strategies for ensuring both accuracy and precision when measuring TSS in environmental samples.

   Hint

   How can you control the variables during your measurements?