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

Calculate the normality (mEq/L) of potassium ions in a 500 mL Ringer's solution that is 2.0 x 10^-3 M in potassium ions.

2.0 mEq/L

0.200 mEq/L

2.5 mEq/L

0.250 mEq/L

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Verified step by step guidance

Understand that normality (N) is a measure of concentration equivalent to molarity (M) multiplied by the equivalent factor. For ions, the equivalent factor is the charge of the ion. Potassium ions (K+) have a charge of +1, so the equivalent factor is 1.

Calculate the normality using the formula: \( N = M \times \text{equivalent factor} \). Since the molarity of potassium ions is given as \( 2.0 \times 10^{-3} \) M and the equivalent factor is 1, the normality is \( 2.0 \times 10^{-3} \) N.

Convert the normality from molarity to milliequivalents per liter (mEq/L). Since 1 N is equivalent to 1000 mEq/L, multiply the normality by 1000 to convert it: \( 2.0 \times 10^{-3} \times 1000 \) mEq/L.

Recognize that the volume of the solution does not affect the normality calculation directly, as normality is a concentration measure. Therefore, the normality remains the same regardless of the volume of the solution.

Review the calculated normality and compare it with the given options to identify the correct answer. The calculated normality should match one of the provided choices.