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4.7 Stoichiometry of Precipitation Reactions

4.7 Stoichiometry of Precipitation Reactions. Section 4.7 Stoichiometry of Precipitations. Show the complete dissociation of each of the following compounds in water and determine how many moles of each ion are in each of the following: a. 4.0 moles of sodium carbonate dissolved in water

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4.7 Stoichiometry of Precipitation Reactions

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  1. 4.7 Stoichiometry of Precipitation Reactions

  2. Section 4.7 Stoichiometry of Precipitations • Show the complete dissociation of each of the following compounds in water and determine how many moles of each ion are in each of the following: • a. 4.0 moles of sodium carbonate dissolved in water • b. 46.5 g of rubidium fluoride dissolved in water • c. 9.32 x 1021atoms of iron (III) chloride dissolved in water • d. 7.8 moles of ammonium sulfate dissolved in water

  3. Problem: How many moles of each ion are in each of the following: • a. 4.0 moles of sodium carbonate dissolved in water MolNa+ = ? 2 mol Na+ 4.0 mol Na2CO3 X ------------------ = 1 mol Na2CO3 2 : 1 ratio 8.0 mol Na+ and 4.0 mol CO32- are present

  4. Problem: How many moles of each ion are in each of the following: • b. 46.5 g of rubidium fluoride dissolved in water MolRb+ = ? 1 molRbF 1 molRb+ 46.5 g RbF X ------------------ X ------------ = 104.47 g RbF 1 molRbF 1 : 1 ratio 0.445 molRb+ and 0.445 mol F- are present

  5. Problem: How many moles of each ion are in each of the following: • c. 9.32 x 1021atoms of iron (III) chloride dissolved in water MolFe3+ = ? 1 molFeCl3 1 mol Fe3+ 9.32 X 1021atoms FeCl3 X ------------------ = X ------------ 6.022 X 1023 atoms FeCl3 1 mol FeCl3 1:3 ratio 0.0155 mol Fe3+ and 0.0465 molCl-are present

  6. Problem: How many moles of each ion are in each of the following: • d. 7.8 moles of ammonium sulfate dissolved in water MolNH4+ = ? 2 molNH4+ X ------------------ 7.8 mol (NH4)2SO4 = 1 mol(NH4)2SO4 2:1 ratio 15.6 molNH4+ and 7.8 molSO4-2 are present

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