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WorksheetsAcid Base Volumetric analysis L.C
Total questions: 14
Worksheet time: 24mins
Acid + Base -->
Hydrogen gas + Salt
Carbon dioxide + Water
Salt + Water
What is the role of an indicator in a reaction?
To help reactants react successfully.
To bind to the analyte to form a products.
To show when the reaction has reached or past the equivalence point.
To provide a surface for the reaction to occur.
What is the main purpose of acid-base titrations?
To test if reactants react.
To calculate the concentration of unknown acid or base.
To test quality of reactants.
What is this piece of apparatus called
Pipette
Burette
Janette
Cuvette
30 mL of NaOH is neutralised by 12.3 mL of 0.2 molL-1 HCl. What is the concentration of the NaOH?
82 molL-1
0.82 molL-1
0.49 molL-1
0.082 molL-1
A 25.00 mL sample of HCl was titrated to the end point with 15.00 mL of 2.00 M NaOH. The following neutralization reaction occured: HCl + NaOH → NaCl + H2O
What is the molarity of the HCl?
0.650 M
1.05 M
1.20 M
1.50 M
What is a suitable indictor to use when titrating a weak acid against a strong base?
Methyl Orange
Methylene Blue
Phenolphthalein
Litmus Indicator
Why must vinegar be diluted before titrating it against sodium hydroxide?
To ensure the titration figure isn't too low
To ensure the titration figure isn't too high
When titrating HCl against NaOH, the indicator methyl orange is used. What is the colour change of the indicator at the end point?
Pink --> Colourless
Yellow --> Pink
Pink ---> Yellow
Colourless --> Pink
In preparing for a titration, what piece of glassware must not be rinsed out with the solution it is to contain?
Pipette
Burette
Conical Flask
Dropper
What is another way of expressing ppm (parts per million)
g/100cm3
g/L
mg/L
mg/100cm3
1.75g of Na2CO3 was dissolved in 250cm3 of deionised water. What is the molarity of this solution?
0.4M
0.066M
0.016M
0.004M
