Problem Set 1 Use the atomic chart and common valences treated in the Mineral Chemistry calculation section to aid solving these problems--Use the textbook and look up the name of the mineral in the appropriate problems |
1. Calculate the weight % of each element in the mineral having the
formula, Cu3AsS4. 2. Calculate the formula for the mineral which has the following weight % com- position Ag+1 = 65.4% S-2 =19.4% As+3 =15.2% 3. Calculate the weight % of each element oxide in the mineral having the formula, PbMoO4 Mo = +6 valence 4. Calculate the weight % of each element oxide in the mineral with the formula, Co3(AsO4)2.8H2O As = +5 5. Calculate the formula (all water as yH2O) for a mineral which has the following element oxide weight % composition Na2O = 22.7% B2O3 = 51.0% H2O = 26.3% Also, determine all possible mineral formulas with different water compositions If the (OH)x : yH2O or x : y =2 : 3 or 4 : 6, what would be the correct formula for the mineral??? 6. Given the following mineral formulas, determine the valence of the element
listed as "X" in |