How do I calculate the ΔH of Mg -LRB- s -RRB- + HCl -LRB- l -RRB- - > MgCl2 -LRB- aq -RRB- + H2 -LRB- g -RRB- ?
How many milliliters of lemon juice do I need to totally dissolve the limescale in the first case 120 mg/l of calcium -LRB- multiplied -RRB- for 15 liters in the second case 440 mg/l of calcium -LRB- multiplied -RRB- for 15 liters ?