Do you intend 2.6 Mg to mean 2.6 mg (meaning milligrams)?
mols Mg = grams/molar mass
Using the coefficients in the balanced equation, convert mols Al to mols Na3AlF6.
Then mass cryolite = mols x molar mass = ?
Here is how you do the mols conversion.
?mols Al x (2 mols Al2O3/4 mols Al) x (1 mol Na3AlF6/1 mol Al2O3) = ? mols Na3AlF6.
luminum oxide is an important starting material for making cryolite, Na3AlF6 (a compound used to give fireworks their yellow colour). First the aluminum oxide is synthesized from aluminum and then reacted with sodium hydroxide and hydrogen fluoride gas. If 2.6 Mg of aluminum is reacted and all other reactants are in excess, calculate the mass of cryolite formed.
4 Al(s) + 3 O2(g) 2 Al2O3(s)
Al2O3(s) + 6 NaOH(aq) + 12 HF(g) 2 Na3AlF6(s) + 9 H2O(l)
1 answer