Please help me with my bio homework Solutions and Dilutions Lab I What part of a
ID: 143379 • Letter: P
Question
Please help me with my bio homework
Solutions and Dilutions Lab I What part of a solution is the solube? 2. What is the other part of a solution 1. If you had a 0.5 M KCI solution, how many moles of solute would you in 1 L of solustion? 4 When given that the molecular weight of KCI is 74 5 g/mol, how many grams is this? 5. Does a I M KCI solution have the same concentration as a I M NaCl solution? Explain your answer 6. If you had a I M NaHCO, solution and you wanted a 0.01 M NaliCO, solution, how could you di- lute the first solution to get the second solution? What is the dilution factor? Describe the steps you would follow to make 100 mL of the 0.01 M NaHC0 solution. 7. If one has a 2 M NaCl solution and they make I liter of a 1:10 dilution of it, how many moles of NaCI are in the dilution? 8. What is the amount of solute (moles) in a 10 100 dilution of a I M KCI solution (1 Liter volume)?Explanation / Answer
1.
A solution is a mixture of both solute and solvent.
The solute is the minor component present in the solution.
Solute dissolves in the solvent.
2.
The solvent is the major component present in a solution.
The solvent dissolves the solute.
3.
1 mole of solution contains 1 mole of solute per liter.
Given is 0.5 M KCl solution, so it contains 0.5 Moles of solute in 1 Litre of the solution.
4.
The molecular weight of Kcl is 74.5 g/mole
That means the mass of 1 mole of KCl is 74.5 g
5. 1 M KCl solution contains 1 mole of KCl in 1 L solution.
1 M NaCl solution contains 1 mole of KCl in 1 L solution.
Both the solutions contain equal amounts of solute molecules. So, they are isotonic solutions.