Question
How many total miles of ions are released when the following sample dissolves completely in water?
9.99 X 10^20 formula units of FeCl3 =
How many grams of solute are needed to make 379 mL of 6.34 X 10^-2 M potassium sulfate?
Calculate the molarity of a solution prepared by diluting 49.48 mL of 0.559 M potassium chloride to 150.00 mL?
9.99 X 10^20 formula units of FeCl3 =
How many grams of solute are needed to make 379 mL of 6.34 X 10^-2 M potassium sulfate?
Calculate the molarity of a solution prepared by diluting 49.48 mL of 0.559 M potassium chloride to 150.00 mL?
Answers
DrBob222
How many total miles of ions are released when the following sample dissolves completely in water?
9.99 X 10^20 formula units of FeCl3 =
<b> So you will have 9.99E20 Fe^3+ ions and 3*9.99E20 Cl^- ions. What is the diameter of Fe^3+? What's the diameter of Cl^-?
Multiply diameter of Fe^3+ by the number of iron ions and add that to the product of the diameter of a chloride ions by number of chloride ions. That will give you the total distance. Convert to miles.Post your work if you get stuck. </b>
How many grams of solute are needed to make 379 mL of 6.34 X 10^-2 M potassium sulfate?
<b>How many formula units do you need? That's M x L = 0.0634 M x 0.379 L = ?
Then grams = formula units x mass of 1 formula unit. Post your work if you get stuck. </b>
Calculate the molarity of a solution prepared by diluting 49.48 mL of 0.559 M potassium chloride to 150.00 mL?
<b> New M = 0.559 M x (49.48 mL/150.00) = ?
Watch the number of significant figures if your prof is picky about that.
9.99 X 10^20 formula units of FeCl3 =
<b> So you will have 9.99E20 Fe^3+ ions and 3*9.99E20 Cl^- ions. What is the diameter of Fe^3+? What's the diameter of Cl^-?
Multiply diameter of Fe^3+ by the number of iron ions and add that to the product of the diameter of a chloride ions by number of chloride ions. That will give you the total distance. Convert to miles.Post your work if you get stuck. </b>
How many grams of solute are needed to make 379 mL of 6.34 X 10^-2 M potassium sulfate?
<b>How many formula units do you need? That's M x L = 0.0634 M x 0.379 L = ?
Then grams = formula units x mass of 1 formula unit. Post your work if you get stuck. </b>
Calculate the molarity of a solution prepared by diluting 49.48 mL of 0.559 M potassium chloride to 150.00 mL?
<b> New M = 0.559 M x (49.48 mL/150.00) = ?
Watch the number of significant figures if your prof is picky about that.