pH and Its Measurement
Chemistry ⇒ Acids, Bases, and Salts
pH and Its Measurement starts at 9 and continues till grade 12.
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See sample questions for grade 11
A pH meter must be calibrated before use. Explain why.
A solution has a pH of 3. Is it acidic, basic, or neutral?
A student adds a few drops of phenolphthalein to a solution and observes that it remains colorless. What can be inferred about the pH of the solution?
A student measures the pH of a solution and finds it to be 6.5. Is the solution slightly acidic, neutral, or slightly basic?
Describe how a universal indicator works to measure pH.
Describe the effect of temperature on the pH of pure water.
A student adds a few drops of phenolphthalein to a solution and observes that it remains colorless. What can be inferred about the pH of the solution?
A student measures the pH of a solution and finds it to be 6.5. Is the solution slightly acidic, neutral, or slightly basic?
Which instrument is commonly used for accurate measurement of pH in laboratories?
(1) Thermometer
(2) pH meter
(3) Barometer
(4) Voltmeter
Which of the following indicators would turn red in a strongly acidic solution?
(1) Phenolphthalein
(2) Methyl orange
(3) Litmus
(4) Bromothymol blue
Which of the following is NOT a method for measuring pH?
(1) pH meter
(2) Litmus paper
(3) Thermometer
(4) Universal indicator
Which of the following pH values indicates a basic solution?
(1) 2
(2) 5
(3) 7
(4) 9
Fill in the blank: A solution with a pH of _______ is considered neutral at 25°C.
Fill in the blank: The mathematical relationship between pH and pOH at 25°C is pH + pOH = _______.
Fill in the blank: The pH scale typically ranges from _______ to _______.
The pH of pure water at 25°C is _______.
True or False: A pH of 7 always indicates a neutral solution at 25°C.
True or False: A solution with a pH of 13 is considered strongly basic.
True or False: The pH of a solution can be negative.
True or False: The pH scale is a logarithmic scale.
