4.2 Acid-base titrations

Question 1

what is a titration used for?

Answer 1

finding the concentration of a solution

identifying unknown chemicals

finding the purity of a substance

Question 2

how is a standard solution formed?

Answer 2

solid is weighed using a weighing boat

solid is dissolved in a beaker using distilled water

solution is transferred into a volumetric flask and distilled water is used to fill the volumetric flask to a graduation line

stopper is added and the volumetric flask is inverted multiple times

Question 3

what would happen if too much water is added when making a standard solution?

Answer 3

larger titre as the solution is now more dilute

Question 4

outline titration

Answer 4

add solution to a conical flask using a pipette

add the other solution to a burette

add indicator to the conical flask

record initial volume, add the solution from the burette and record the final volume

titre = final - initial

Question 5

how can titrations be concordant?

Answer 5

results within 0.1 cm3

Question 6

effect of having an air bubble in burette on tire?

Answer 6

larger titre as reading is greater

Question 7

effect of burette readings being taken from the top of the meniscus?

Answer 7

no effect as the difference is the same

Question 8

where on the meniscus is the volume read?

Answer 8

the bottom