This is a limiting reagent problem. We know that because amounts are given for BOTH reactants.
mols Mg = grams/molar mass
mols Cl2 = grams/molar mass
Use the coefficients in the balanced equation to convert mols Mg to mols MgCl2.
Do the same to convert mols Cl2 to mols MgCl2.
It is likely that the two values will not agree which means mone of them is wrong; the correct answer in limiting reagent problems is ALWAYS the smaller value and the reagent producing that value is the limiting reagent (LR).
Using the smaller value, convert to grams. g = mols x molar mass
Solid magnesium metal reacts with chlorine gas according to the following equation:
Mg + Cl2 --> MgCl2
What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2
use the masses to two decimal places on the chart in the front of your text book. Round your answer to two decimal places, do not include units.
1 answer