Basic Facts
pH Scale
Calculating pH
Measuring pH
pH Meter
100
What is a solution with a pH of less than 7 classified as?
What is acid.
100
What is the range of the pH scale?
What is 14.
100
What is the equation to calculate the hydronium ion concentration from the pH?
What is [H3O+] = 10^-pH
100
What is the purpose of an indicator?
What is identify the pH number of a substance through a paper dye turning different color.
100
What is a pH meter?
What is an electrochemical instrument that can measure pH accurately.
200
.What happens when mixing bases and acids together?
What is it can cancel out or neutralize their effects
200
The darker colors are located on the right side of the scale which is the _____ side.
What is base.
200
Solution has a pH of 2. what will the Molarity be of [H3O+]?
What is 0.01M.
200
What are the usual indicators?
What is litmus paper and synthetic.
200
Is the pH meter and indicators measured the same way?
What is it is a different procedure, but the outcome is the same.
300
What is a solution with a pH of greater than 7 classified as?
What is base.
300
A pH value under 7 is 10 times more acidic than the higher value. True or False?
What is true.
300
Write out the equation for calculating pH.
What is pH= -log[H3O+]
300
True or False: Thymol blue indicator remains blue when pH of a solution is 10 or higher.
What is true, it is a base.
300
The probes in the machine creates an electrical voltage between two electrodes. True or false?
What is true.
400
What is it called when acidity and basicity are balanced?
What is neutral.
400
Why is pure water natural?
What is neither acidic or basic in its natural state.
400
Since the log has a negative sign, what will happen to the concentration of hydronium ion and the pH?
What is the hydronium ion concentration will increase, while the pH will decrease.
400
How are universal indicators are made?
What is blending numerous indicators together to combine into a universal indicator which changes color thruoughout the pH range.
400
Where does the measurement of the pH reading show up?
What is on the meter's screen.
500
What do the letters pH represent?
What is power of Hydrogen.
500
Two ways to use the pH scale are with a ________ and ________.
What is indicators and pH meters.
500
What is the pH of a solution that contains 15.0 grams of HCl dissolved in 7.0L of solution?
What is pH=1.2
500
How is the pH paper beneficial?
What is matching the color the paper develops to a standard chart, it is easier to measure the solution's pH.
500
How can a pH meter be precise?
What is can measure pH of 0.01 pH units, which is greater than the precision with indicators.
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