Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

9. Solutions

Percent Concentrations

GOB Chemistry

9. Solutions

Percent Concentrations

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4:08 minutes

Problem 51b

Textbook Question

A patient receives 100. mL of 20.% (m/v) mannitol solution every hour.
b. How many grams of mannitol does the patient receive in 12 h?

Verified step by step guidance

Step 1: Understand the given information. The solution is 20.% (m/v), which means there are 20 grams of mannitol in 100 mL of solution. The patient receives 100 mL of this solution every hour for 12 hours.

Step 2: Calculate the amount of mannitol in 100 mL of solution. Use the formula for mass/volume percent: \( \text{(m/v)} = \frac{\text{mass of solute (g)}}{\text{volume of solution (mL)}} \times 100 \). Rearrange to find the mass of solute: \( \text{mass of solute (g)} = \text{(m/v)} \times \frac{\text{volume of solution (mL)}}{100} \).

Step 3: Substitute the given values into the formula. Use \( \text{(m/v)} = 20 \% \) and \( \text{volume of solution} = 100 \ \text{mL} \) to calculate the mass of mannitol in 100 mL of solution.

Step 4: Determine the total amount of solution the patient receives in 12 hours. Multiply the volume of solution received per hour (100 mL) by the total time (12 hours).

Step 5: Calculate the total mass of mannitol received in 12 hours. Multiply the mass of mannitol in 100 mL (calculated in Step 3) by the total number of 100 mL portions received (calculated in Step 4).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Mannitol Solution Concentration

Mannitol solution concentration is often expressed as mass/volume percentage (m/v), which indicates the number of grams of solute (mannitol) per 100 mL of solution. In this case, a 20% (m/v) solution means there are 20 grams of mannitol in every 100 mL of the solution.

Volume Administration Rate

The volume administration rate refers to the amount of solution given to a patient over a specific time period. In this scenario, the patient receives 100 mL of mannitol solution every hour, which is crucial for calculating the total volume administered over a longer duration, such as 12 hours.

Total Dose Calculation

Total dose calculation involves determining the total amount of a substance administered over a specified time. To find out how many grams of mannitol the patient receives in 12 hours, one must multiply the hourly dose of mannitol by the total number of hours, taking into account the concentration of the solution.

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