Uncertainty

Question 1

how can you reduce uncertainties in a titration

Answer 1

• replace measuring cylinders with pipettes or burette which have a lower apparatus uncertainty will lower the error
• in a burette reading :
  make the titre a larger volume .
  By increasing the volume and conc of the substance in the conical flask or by decreasing conc of substance in the burette

Question 2

how can you reduce uncertainty in measuring mass

Answer 2

• using a more accurate balance or larger mass will reduce uncertainty in weighing a solid
• weighing sample before and after passion and then calculating difference will ensure a more accurate measurement of mass added

Question 3

how can you find out if there’s a discrepancy in the result due to other errors

Answer 3

if the % uncertainty due to the apparatus < percentage difference between the actual value and the calculated value

Question 4

how can you find out there’s been errors by the sensitivity of the equipment

Answer 4

if the %uncertainty due to apparatus > percentage difference between the actual value and the calculated value