Question

3. Along those same lines now we move from moles of ions to mole of charge. Keep in mind that we talk about cmoles instead of moles in soils and 1 cmol = 1/100 of a mole.

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Ex. 40g Ca²⁺ x 1mole Ca²⁺/40 g Ca²⁺ x 2 mol_c/1 mole Ca²⁺=2 mol_c

1mole H⁺ = ___________ mol (+)

1mole Ca²⁺ = ___________ mol (+)

1mole Al³⁺ = ___________ mol (+)

60g of Ca²⁺ = ___________ mol (+)

10 g Al³⁺ = ___________ mol (+)

39 g K⁺ = _________ cmol (+)

Answer 1

1) 1mole H+ = 1mole H+ x 1mol(+)/1mole H+ = 1mol (+)

2)1mole Ca2+=1mol Ca2+ x 2mol(+)/1mol Ca2+ = 2mol (+)

3) 1mole Al3+ = 1mol Al3+ x 3 mol(+)/1mol Al3+ = 3mol (+)

4) 60g of Ca2+ = 60g of Ca2+ x 1mol Ca2+/40 g Ca2+ x 2mol(+)/1mol Ca2+

= 3mol (+)

5) 10 g Al3+ = 10 g Al3+ x 1mol Al3+/27g Al3+ x 3mol(+)/1mol Al3+

= 1.11mol (+)

6) 39 g K+ = 39 g K+ x 1mol K+/39 g of K+ x 1mol(+)/1mol K+ x 100cmol(+)/1mol(+)

= 100cmol(+)

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