7. Write the balanced equation for the equation for the reaction of magnesium with HCl. What is the mole ratio between magnesium and magnesium chloride will be produced? If 2.5g of magnesium react, how many moles of magnesium chloride will be produced? How many grams of magnesium chloride will be produced?
Mg + 2HCl ==> MgCl2 + H2
1. Convert 2.5 g Mg to moles. # moles = grams/molar mass.
2. Using the coefficieints in the balanced equation, convert moles Mg to moles MgCl2.
3. Convert moles MgCl2 to grams. # grams = moles x molar mass.
Post your work if you get stuck.
0.04
9.79
1.59×20^23
To write the balanced equation for the reaction of magnesium with HCl, let's first understand the reaction. Magnesium (Mg) reacts with hydrochloric acid (HCl) to produce magnesium chloride (MgCl2) and hydrogen gas (H2). The balanced equation for this reaction is:
Mg + 2HCl -> MgCl2 + H2
The mole ratio between magnesium and magnesium chloride is 1:1. This means that for every 1 mole of magnesium that reacts, 1 mole of magnesium chloride is produced.
To find the number of moles of magnesium chloride produced when 2.5g of magnesium react, we need to convert grams of magnesium to moles using its molar mass. The molar mass of magnesium is 24.31 g/mol.
First, calculate the number of moles of magnesium:
moles of Mg = mass of Mg / molar mass of Mg
moles of Mg = 2.5g / 24.31 g/mol
moles of Mg = 0.103 mol
Since the mole ratio between magnesium and magnesium chloride is 1:1, 0.103 moles of magnesium will produce 0.103 moles of magnesium chloride.
Finally, to find the mass of magnesium chloride produced, we need to multiply the moles of magnesium chloride by its molar mass. The molar mass of magnesium chloride (MgCl2) is 95.211 g/mol.
mass of MgCl2 = moles of MgCl2 * molar mass of MgCl2
mass of MgCl2 = 0.103 mol * 95.211 g/mol
mass of MgCl2 = 9.8 g
Therefore, when 2.5g of magnesium reacts, 0.103 moles of magnesium chloride will be produced, which is equal to 9.8 grams of magnesium chloride.