Which piece of apparatus is used to accurately measure the volume of a reactant before transferring it to a conical flask?
Pipette
Burette
Measuring cylinder
Which piece of apparatus is used to add small measured volumes of one reactant to the other reactant in a titration?
How many decimal places should a titre be recorded to?
1
2
3
If the start reading in a titration is 0.50 cm3 and the end reading is 26.95 cm3, what is the titre?
26.95 cm3
27.45 cm3
26.45 cm3
Three titres are calculated: 25.20 cm3, 25.30 cm3, 25.35 cm3. What is the mean titre?
75.85 cm3
25.30 cm3
25.28 cm3
Which precaution reduces the risk of harm from broken glass?
Wearing eye protection
Working in a laboratory with the windows open
Tying back long hair
What is 25.75 cm3 in dm3? - Higher
2.5750 dm3
0.02575 dm3
0.2575 dm3
What is the amount in mol of sodium hydroxide in 25.00 cm3 of a solution of concentration 0.10 mol/dm3? - Higher
2.5 mol
0.25 mol
0.0025 mol
What is the concentration of a 0.10 mol/dm3 solution of sodium hydroxide, NaOH, in g/dm3? - Higher
Ar of Na = 23, Ar of O = 16, Ar of H = 1.
4.0 g/dm3
40 g/dm3
400 g/dm3
What is the concentration in mol/dm3 of a solution in which 0.40 mol of alkali is dissolved in 250 cm3 of solution? - Higher
1.60 mol/dm3
0.10 mol/dm3
0.0016 mol/dm3