How do u balance equations in chemistry? for example H2SO4+Al-----> ?

Question

How do u balance equations in chemistry? for example H2SO4+Al-----> ?

Answer 1

remember that:

A + B ----->AB

AB ---> A + B

A + BC ---> AC + B

AB + CD ---> AD + CB

Look at the products and the reactants.  Aluminum's charge is 3+, Hydrogen is 1+, but if it's by itself its a diatomic molecule.  Try going from there.  Match the products with the reactants to get the same charge. on each side.

Answer 2

well H has a charge of +1 (SO4) has a charge of -2 and Al is +2

so we swap Al for H2 making AlSO4+H2

now if we had just had one H and had Na or something replace it we would have to mix it up a little

HNO3+Na ----> NaNO3 + H2 (h2 becuase hydrogen is a diatomic, meaning it bodns with itself)

we dont have a balanced eqaution here because we have 1 H on one side and two on the other so we add coefficients

2HNO3+2Na-----> 2NaNO3 + H2

hope it helped