Amount Of Substance

Question 1

Equation for percentage yield

Answer 1

Actual mass/theoretical mass

Question 2

percentage error

Answer 2

Error of the equipment/amount measured x100

Question 3

Process of making a standard solution

Answer 3

-weight the sample in a weighing boat Containing the solid on a 2nd balance
-transfer to beaker and re weight the measuring boat
-record the difference in mass
-add distilled water
-stir with a glass rod until all solid has dissolved
-transfer to volumetric flask using a funnel with washings
-make up to 250 cm mark with water
-invert to make sure all moles are equal throughout

Question 4

How to get a larger titre

Answer 4

Decrease the concentration of the solution in the Burette

Question 5

Ideal gas equation

Answer 5

Pv=nrt

Question 6

Units for volume in ideal gas equation

Answer 6

M3

Question 7

Units for pressure in ideal gas equation

Answer 7

Pa

Question 8

Percentage economy equation

Answer 8

Mr of desired product/mr of all reactants x100