Given mass of A
Find concentration of a solution of B if the volume is given
Substances A and B are in the equation for a reaction:
aA + bB
cC + dD
The pathway shown below is between m(known) and m(unknown) if both the known and unknown are involved in the same chemical reaction. Problems involving calculations of this type are in the "Moles and Grams" module.
Calculating the concentration of B in a given volume of a solution of B that reacts with a known mass of substance A is very similar. The only difference is in the last step where, since a concentration is required, the amount in moles of B is divided by the given volume in litres.
aA + bB
cC + dDThe pathway shown below is between m(known) and m(unknown) if both the known and unknown are involved in the same chemical reaction. Problems involving calculations of this type are in the "Moles and Grams" module.
| Known |
|
| |||||||||
| m(A) | | n(A) | | ||||||||
| mass of A | Step 1 | moles of A | Step 2 |
| m = n × M | Unknown | |
| n(B) | | m(B) |
| moles of B | Step 3 | mass of B |
Calculating the concentration of B in a given volume of a solution of B that reacts with a known mass of substance A is very similar. The only difference is in the last step where, since a concentration is required, the amount in moles of B is divided by the given volume in litres.
| Known |
|
| ||||||||
| m(A) | | | ||||||||
| mass of A | Step 1 | Step 2 |
| Unknown | ||||
| n(B) | | c(B) | |||
| moles of B | Step 3 | concentration of B |