I don\'t know the formula for these? Can anyone help me with this? 25. DISCUSSIO

Question

I don't know the formula for these? Can anyone help me with this?

25. DISCUSSION The unknowns are each one of the following metals: La, Ba, Mn, or Pb. Calculate the theoretical values of g M / moles H2 for each of these metals. In each case, the metal chloride product is identified to the right to help you determine the ratio of moles M / moles H2 produced. g La / moles H2 (LaCl3 is produced) g Ba / moles H2 (BaCl2 is produced) g Mn / moles H2 (MnCl2 is produced) g Pb / moles H2 (PbCl2 is produced)

Explanation / Answer

1)

La + 6HCl ---------------------> LaCl3 + 3H2

138.9g                                                 3 mol H2

138.9g La will give 3 mol of H2

so

138.9g La / 3 moles H2

2)

Ba + 2 HCl ----------------------> BaCl2 + H2

137.2 g                                                     1

137.2 g of Ba will give 1 mol of H2

so

137.2 g Ba / 1 mol H2

3)

Mn + 2 HCl ----------------------> MnCl2 + H2

54.9 g                                                     1

54.9 g of Mn will give 1 mol of H2

so

54.9 g Mn / 1 mol H2

4)

Pb + 2 HCl ----------------------> PbCl2 + H2

207 g                                                     1

207 g of Pb will give 1 mol of H2

so

207 g Pb / 1 mol H2

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