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

Equivalents

GOB Chemistry

9. Solutions

Equivalents

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Multiple Choice

The concentration of Cl^- ion in blood is approximately 105 mEq/L. How many milliliters of blood would be needed to obtain 1.4 g of Cl^- ions?

110 mL

380 mL

75 mL

240 mL

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Verified step by step guidance

First, understand that mEq/L (milliequivalents per liter) is a unit of concentration that relates to the charge of ions in solution. For Cl-, which has a charge of -1, 1 mEq is equivalent to 1 mmol.

Convert the mass of Cl- ions from grams to millimoles. Use the molar mass of Cl, which is approximately 35.45 g/mol, to find the number of millimoles in 1.4 g of Cl-.

Calculate the number of milliequivalents of Cl- ions in 1.4 g using the relationship that 1 mmol of Cl- is equivalent to 1 mEq.

Use the concentration of Cl- ions in blood, which is 105 mEq/L, to determine the volume of blood needed. Set up a proportion where the number of milliequivalents calculated in the previous step is equal to the product of the concentration and the volume of blood in liters.

Solve the proportion for the volume of blood in liters, and then convert this volume from liters to milliliters by multiplying by 1000, as there are 1000 mL in 1 L.