pH Measurement Quiz

What does pH measure in a liquid solution?

• Hydrogen ion concentration

• Volume

• Temperature

• Pressure

What is the pH value of a neutral solution?

• Depends on the temperature

• Less than 7

• Greater than 7

• Equal to 7

What does a change of one pH unit correspond to?

• 20 fold change of hydrogen-ion concentration

• 10 fold change of hydrogen-ion concentration

• 2 fold change of hydrogen-ion concentration

• 5 fold change of hydrogen-ion concentration

What is the scale of a pH meter?

• 0 to 7

• 0 to 20

• 0 to 10

• 0 to 14

Which electrode is most commonly used as an indicator electrode in a pH meter?

• Glass electrode

• Silver electrode

• Platinum electrode

• Calomel electrode

What is the purpose of a reference electrode in a pH meter?

• To measure the acidity of the sample

• To provide a baseline for measurement

• To calibrate the meter

• To store the pH values

What is the accuracy of pH measurement by using a pH meter dependent upon?

• Temperature only

• External factors only

• Calibration of electrodes only

• External factors and calibration of electrodes

What is the function of a voltmeter in a pH meter?

• Translates electrode potential to pH scale

• Calibrates the electrodes

• Measures the temperature of the solution

• Measures the acidity of the sample

What is the pH value of a basic solution?

• Greater than 7

• Equal to 7

• Depends on the concentration of ions

• Less than 7

What is the purpose of standard buffers in pH measurement?

• To clean the electrodes

• To provide constant pH values for calibration

• To increase the acidity of the solution

• To measure the temperature of the solution