22 Pracs Flashcards
1
Q
Ass 4 q 23a) read context & calculate magnification (scale bar is 37 mm)
A
Formula: M= Image size/actual size
image length= 37x 1000= 37000um
Actual length= 150 um
M= 37000/150
M=X247
2
Q
What relationships could be investigated with a colorimeter? 2
A
The effect of high intensity on the rate at which a solution of light sensitive dye changes from green to colourless
The effect of temperature on the rate of breakdown of cell membranes in tissues with pigmented cells, such as beetroot
3
Q
Mid course Q11 b) calculate the rate of reaction when the standard brown colour was reached in 2 minutes 30 seconds
A
0.4
