Practical Skills

Question 1

10^-1

Answer 1

Deci

Question 2

10^-2

Answer 2

Centi

Question 3

10^-3

Answer 3

Milli

Question 4

10^-6

Answer 4

Micro

Question 5

1 dm^3 = ?

Answer 5

1L

Question 6

1 cm^3 =?

Answer 6

1 ml

Question 7

1 dm^3 = ?

Answer 7

10^3 cm^3

Question 8

What is k equal to when rate = k[A]^2[B]

Answer 8

K= rate/ [A]^2[B]

Question 9

What happens to Kc if ammonia is removed from the reaction vessel
Kc= [NH3]^2 / [N2][H2]^3

Answer 9

If ammonia is removed from the reaction vessel, the concentration of ammonia will decrease so the numerator will also decrease

Question 10

What would happen if the denominator remained the same in the Kc constant equation?

Answer 10

If the denominator remained the same, and ammonia was removed , the Kc constant would decrease. However as temperature is constant, Kc must sty the same

Question 11

How do you keep Kc the same

Answer 11

If the numerator decreases, the denominator must decrease. Hence the position of the equilibrium shifts to the right.

Question 12

% uncertainty

Answer 12

Absolute uncertainty/quantity measured x 100

Question 13

What do you do when measuring a difference

Answer 13

Multiply the numerator by a factor of 2 because there is an uncertainty associated with both readings

Question 14

What is an interpolation

Answer 14

The line of best fit can be used to read values within the experimental range

Question 15

What is extrapolation

Answer 15

The line of best fit needs to be extended to the appropriate point