TUTORIAL: CHAPTER 1

Front

What is the definition of accuracy in measurements?

Back

Accuracy refers to how close a measured value is to the true value.

Front

What is the definition of precision in measurements?

Back

Precision refers to the consistency of repeated measurements, regardless of their closeness to the true value.

Front

What does it mean if a measurement is both accurate and precise?

Back

It means the measurements are close to the true value and are consistently close to each other.

Front

What is qualitative analysis?

Back

Qualitative analysis is a method used to determine the presence or absence of a substance.

Front

What is quantitative analysis?

Back

Quantitative analysis is a method used to determine the quantity or concentration of a substance.

Front

What type of analysis is required to identify a suspicious substance at a crime scene?

Back

Both qualitative and quantitative analysis are required.

Front

What type of analysis is needed to determine the concentration of heavy metals in water?

Back

Quantitative analysis is needed.

Front

What is the significance of a true value in titration?

Back

The true value is the actual volume or concentration that is being measured, which serves as a benchmark for accuracy.

Front

If three readings are 25.20 mL, 25.10 mL, and 25.20 mL, how would you classify them?

Back

These readings are both accurate and precise.

Front

If three readings are 23.20 mL, 23.10 mL, and 23.00 mL, how would you classify them?

Back

These readings are precise but not accurate.