# Analytical Chemistry Video Pack

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An interactive video pack featuring videos from Teacher's Pet.

# Arithmetic of Equations - Video

Question 1

You want to make two dozen cupcakes but only have enough ingredients for one dozen. Your recipe makes two dozen so you halve the amount of each ingredient necessary. What do you expect to happen?

A

One dozen cupcakes does not taste as good as two dozen.

B

One dozen cupcakes will have half the mass of two dozen cupcakes.

C

You will end up making four dozen cookies by halving the amount of each ingredient.

Question 2

In the following reaction, how many atoms are on each side of the equation? 2Al (s) + 3CuSO$_4$ (aq) → Al$_2$(SO$_4$)$_3$ (aq) + 3Cu (s)

A

5 on the reactants' side, 4 on the products' side

B

20 on the reactants' side, 20 on the products' side

C

7 on the reactants' side, 7 on the products' side

D

4 on the reactants' side, 5 on the products' side