1.1.2 liquids and solutions

Question 1

how do dilutions in a linear dilution series differ

Answer 1

by an equal interval - like 0.1,0.2,0.3

Question 2

how do dilutions in a log dilution series differ

Answer 2

a constant proportion

Question 3

what does plotting measured values for known concentrations to produce a line or curve allow

Answer 3

the concentration of an unknown to be determined from the standard curve

Question 4

how can the ph of a reaction mixture be kept constant

Answer 4

addition of a buffer as the addition of acid or alkali has a small effect on the pH the buffer

Question 5

what do you use a blank for in calibration of a colorimeter

Answer 5

creates a base line for accurate comparisons

Question 6

what can absorbance values obtained from a colorimeter determine

Answer 6

concentration of a colored solution using suitable wavelength filters

Question 7

what can be used to determine turbidity

Answer 7

percentage transmission

Question 8

what is turbidity

Answer 8

the measure of how clear a liquid is