PRACTICE PROBLEMS 9.5 Dilution of Solutions LEARNING GOAL Describe the dilution of a solution; calculate the unknown concentration or volume when a solution is diluted. 9.55 Calculate the final concentration of each of the following: a. 2.0 L of a 6.0 M HCl solution is added to water so that the final volume is 6.0 L. b. Water is added to 0.50 L of a 12 M NaOH solution to make 3.0 L of a diluted NaOH solution. c. A 10.0-mL sample of a 25% (m/v) KOH solution is diluted with water so that the final volume is 100.0 mL. d. A 50.0-mL sample of a 15% (m/v) H2SO4 solution is added to water to give a final volume of 250 mL. 9.56 Calculate the final concentration of each of the following: a. 1.0 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0 L. b. Water is added to 0.25 L of a 6.0 M NaF solution to make 2.0 L of a diluted NaF solution. c. A 50.0-mL sample of an 8.0% (m/v) KBr solution is diluted with water so that the final volume is 200.0 mL. d. A 5.0-mL sample of a 50.0% (m/v) acetic acid (HC2H3O2) solution is added to water to give a final volume of 25 mL. 9.57 Determine the final volume, in milliliters, of each of the following: a. a 1.5 M HCl solution prepared from 20.0 mL of a 6.0 M HCl solution
Added by Gemayrole A.
Close
Step 1
Step 1: Calculate the initial concentration of the solution before dilution. Show more…
Show all steps
Your feedback will help us improve your experience
Ronald Prasad and 99 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
1. (LO 2) For each of the following dilutions, calculate the dilution factor between the original liquid and the final solution. (a) 20 mL of solution Q is diluted to 100 mL. (b) 500 ̀μ́L of solution X is diluted to 2.0 mL. (c) 150 ̀μ́L of serum is added to 300 ̀μ́L of saline solution, and 20 ̀μ́L of the resulting solution is added to 180 ̀μ́L of saline solution. (d) 25 mL of liquid W is diluted with solution Z to 75 mL and then to 750 mL with saline solution. (e) 0.10 mL of plasma is diluted to 1.0 mL, and the resulting solution is brought to a final volume of 4.0 mL with diluent. (f) 50 ̀μ́L of urine is added to 0.150 mL of water. (g) 300 ̀μ́L of cerebrospinal fluid is added to 2.70 mL of diluent, and 0.50 mL of the resulting solution is added to 2.0 mL of saline solution. (h) 5 mL of liquid K is added to 5.0 L of water. (i) 10 ̀μ́L of urine is added to 90 ̀μ́L of diluent, and the resulting solution is brought to a final volume of 0.50 mL with water. (j) 5 ̀μ́L of whole blood is pipetted into 1.0 mL of diluent. (k) 0.040 mL of serum is added to 260 ̀μ́L of saline solution, and 150 ̀μ́L of the resulting solution is added to 1.35 mL of saline solution. (l) 13 mL of solution M is brought to a final volume of 100 mL with solution N. (m) 0.55 mL of plasma is mixed with 0.45 mL of diluent. (n) 1.0 mL of saline solution is mixed with 0.50 mL of water.
Adi S.
4. DILUTION PROBLEMS i. How would you prepare: a. 10 mL of a 1:10 dilution of a 1 M NaCl solution and what would the final concentration of NaCl? b. 80 mL of a 1:20 dilution of a 1 M NaCl solution? c. 50 mL of a 1:25 dilution of a 1 M NaCl solution? ii. How would you prepare exactly 6 mL of a 1/20 dilution (assume the concentration of your starting solution is "1")? iii. You are provided with an antibody solution (Ab) that has a concentration of 600 microgram (μg) / microlitre (αL). For lab, it is necessary to make the following dilutions: a. 10 μL of 600 μg/ μ L Ab + 190 μ L of buffer to make a 1:20 dilution at _ μg/μ L b. 20 μ L of 1:20 Ab + 40 μ L of buffer to make a 1:60 dilution at _ μg/μ L c. 5 μ L of 1:60 Ab + 5 μ L of buffer to make a _ dilution at _ μg/μ L d. 10 μ L of 1:60 Ab + 90 μ L of buffer to make a _ dilution at _ μg/μ L e. 10 μ L of 1:60 Ab + 40 μ L of buffer to make a _ dilution at _ μg/μ L f. 10 μ L of 1:60 Ab + 10 μ L of buffer to make a _ dilution at _ μg/μ L iv. How much 2.0 M NaCl solution would you need to make 250 mL of 0.15 M NaCl solution? v. What would be the concentration of a solution made by diluting 45.0 mL of 4.2 M KOH to 250 mL? vi. What would be the concentration of a solution made by adding 250 mL of water to 45.0 mL of 4.2 M KOH? vii. How much 0.20 M glucose solution can be made from 50.0 mL of 0.50 M glucose solution? viii. What is the molarity of a solution that has 4.5 mol of solute dissolved in 300 ml of solution? ix. What is the molarity of a solution of NaOH that has 0.491 g dissolved in 400 ml of solution? x. What is the molarity of a solution prepared by diluting 10.00 ml of a 4.281 M solution to 50.00 ml?
9.47 solutions
Ronald P.
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD