what amount of magnesium chloride will be produced when 250 ml of 8.0 mol/Hcl reacts with excess magnesium
To determine the amount of magnesium chloride produced, we need to use the stoichiometry of the balanced chemical equation between hydrochloric acid (HCl) and magnesium (Mg).
The balanced chemical equation for the reaction between HCl and magnesium is:
2 HCl + Mg -> MgCl2 + H2
From the equation, we can see that 2 moles of HCl react with 1 mole of magnesium to produce 1 mole of magnesium chloride (MgCl2).
We know that the hydrochloric acid concentration is 8.0 mol/L, and we have 250 mL of it. To calculate the number of moles of HCl, we can use the formula:
moles = concentration * volume
moles = 8.0 mol/L * 0.250 L = 2.0 moles
Since 2 moles of HCl react with 1 mole of magnesium, we can conclude that we would need 1/2 of the moles of HCl to react with magnesium.
Therefore, the amount of magnesium chloride produced would be 1.0 mole.
Note: Excess magnesium means there is more magnesium than needed for the reaction, so it won't be completely consumed.