4 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Checking a Sensor That Tops Out 4 questions
Checking a Sensor That Tops Out
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A classroom meter measures a rinsewater signal in model units. A reference has a known true signal. The class tests two meters over the same range. Meter B’s error is assumed to be constant within this range if the reference results support that model.
| True reference signal | Meter A display | Meter B display |
|---|---|---|
| 4 | 4 | 4.5 |
| 8 | 8 | 8.5 |
| 10 | 8 | 10.5 |
| 12 | 8 | 12.5 |
Question 1
Which pair of references most directly shows that A can give the same display for different true signals?
- 4 and 8
- 4 and 10
- 8 and 12
- The two meters always give identical readings.
Question 2
Explain why subtracting one constant from A’s display cannot recover both true signals of 8 and 12.
Write your answer and work on the printable worksheet, or answer online.
The unknown rinsewater gives 8 on A and 11.5 on B. The sample is within the range of the reference tests.
Question 3
Estimate the true signal from B. State what correction is supported by its reference readings.
Write your answer and work on the printable worksheet, or answer online.
Question 4
Describe a check that tests whether A stays limited to a display of 8 for true signals between 8 and 10.
Write your answer and work on the printable worksheet, or answer online.
2025 Chemistry Reference Tables · Browse Chemistry worksheets