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 mass (grams) needed for the following ion equivalent:1.5 mEq of Na⁺ ions.

3.4 g

15.0 g

0.065 g

0.034 g

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Verified step by step guidance

Understand the concept of milliequivalents (mEq). Milliequivalents are a measure of the chemical activity of ions in a solution, often used in medical and chemical calculations. It relates to the number of ions and their charge.

Identify the molar mass of sodium (Na). Sodium has a molar mass of approximately 23 g/mol.

Recognize that 1 equivalent of Na+ corresponds to 1 mole of Na+ ions, since Na+ has a charge of +1. Therefore, 1 mEq of Na+ is 1/1000 of a mole of Na+.

Calculate the number of moles of Na+ ions needed for 1.5 mEq. Since 1 mEq is 1/1000 of a mole, 1.5 mEq is 1.5/1000 moles.

Convert the moles of Na+ to grams using the molar mass. Multiply the moles of Na+ by the molar mass of sodium (23 g/mol) to find the mass in grams.