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Iron (III) chloride reacts with barium hydroxide according to the following reaction: Fe³⁺ (aq) + 3OH^- (aq) Fe(OH)₃(s)
1. What volume of 0.2500 M iron (III) chloride is required to react completely with 37.0 m of 0.175 M barium hydroxide?
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2. How many grams of Fe(OH)₃ (Molar mass = 106.9 g/mol) are obtained from the reaction above?
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1. Consider the following balanced net ionic equation: 3SO₃^2- (aq) + 2 CrO₄^2- (aq) + 10 H⁺(aq) 3SO₄^2- (aq) + 2 Cr³⁺ (aq) + 3H₂O How many grams of Na₂CrO₄ (MM = 162 g/mol) are theoretically required to completely oxidize 37.8 g of Na₂SO₃ (MM = 126 g/mol) ?
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2. In acidic solution, periodate ions oxidize nickel (II) ions to produce iodided ions and nickel (III) ions.
  1. Write the symbols for the reactants:
  2. Write the symbols fo the products:
  3. WRite a balanced net ionic oxidation half-reaction:
  4. Write a balanced net ionic reduction half-reaction:
  5. Write the balanced net ioni redox equation:
The following four questions are not related:
1. A sealed glass tube filled with helium gas at 308K and 1.25 atm is put in a freezer where the temperature is 241 K. What is the presure of the helium gas in the freezer in atm?
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2. What is the density of methane (in g/ iter), MM = 16.04 g/mol, at 727 mm Hg and 28C?
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3. When chromium metal is added to HC the balanced net ionic equation for the reaction is 2Cr(s) + 6H⁺(aq) 2Cr³⁺(aq) + 3H₂(g) How many m if hydrogen gas at 22 C and 1.00 atm can be theoretically obtained when 35.0 m if 6.45 M HC are added to an excess of chromium metal?
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4. Oxygen gas is collected over water at 25C (vp water = 23.8 mm Hg) into a 10.00 iter flask at 25C and 0.952 atm.
  1. How many moles of wet gas are collected?
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  2. What is the partial pressure of oxygen (in atm) ?
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  3. How many moles of oxygen are collected?
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  4. What is the mole fraction of water?
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In experiment 5, a student obtains the following dat to determine the percent chloride in an unknown sample:
molarity o fAgNO₃ solution = 0.05689 M
mass of sample - 0.2585 g
initial buret reading = 10.00 m
final buret reading = 57.28 m
1. What volume of AgNO₃is used to titrate the sample?
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2. How many mole of AgNO₃ are used to titrate the sample?
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3. How many moles of C ^- are present in the sample?
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4. What is the mass of C^- present in the sample?
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5. What is the mass percent of C^- in the sample?
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BONUS
Consider two bulbs connected by a valve. Bulb A has a volume of 700.0M and contains nitrogen gas at a pressure of 0.800 atm. Bulb B has a volume of 900.0 m and contains hydrogen at a pressure of 0.700 atm. What is the pressure (in atm) in the two tanks when the valve is opened? Nitrogen reacts with hydrogen to yield ammonia. (Ignore the volume of connecting tubing between the two bulbs.)
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What are your answers? After you have chosen answers (above) press the Submit button to have them graded.
Query, are the (above) answers correct?