HCl is the limiting reagent.
magnesium chloride
because it is cool
Magnesium + Hydrochloric acid ----> Magnesium Chloride + HydrogenMg + 2 HCl -----> MgCl2 + H2
HCl + Mg -----> MgCl2 + H2
2 HCl + Mg(OH)2 ----> MgCl2 + 2H2O
Assuming we are at standard temperature and pressure (STP), the answer is approximately 1.85L of hydrogen gas. The HCl is the limiting reactant and the Mg is the excess reactant.
Mg + 2HCl = MgCl2 + H2
magnesium chloride
because it is cool
Magnesium + Hydrochloric acid ----> Magnesium Chloride + HydrogenMg + 2 HCl -----> MgCl2 + H2
5.05 g/mol
HCl + Mg -----> MgCl2 + H2
2 HCl + Mg(OH)2 ----> MgCl2 + 2H2O
Moles Mg = 3.00 g / 24.312 g/mol =0.123 Moles O2 = 2.20 / 32 g/mol = 0.0688 2 Mg + O2 >> 2 MgO the ratio between Mg and O2 is 2 : 1 0.123 / 2 = 0.0615 moles O2 needed we have 0.0688 moles of O2 so O2 is in excess and Mg is the limiting reactant we get 0.123 moles of MgO => 0.123 mol x 40.31 g/mol =4.96 g
Mg + 2HCl = MgCl2 + H2 SO magnesium chloride and Hydrogen gas
The potassium hydroxide is what we call the limiting reactant. 4 moles of potassium hydroxide react with 2 moles of magnesium chloride. The third mole of magnesium chloride is in excess and has no effect.
mg+Hcl----------->mgcl2 + H2 You could see bubble in the solution while reacting. After the reaction the reactant will just become a colourless solution