What is the Molecular Weight of NaOH?

Verified Answer:

Molecular Weight of NaOH = 23+16+1 = 40 g/mol

To answer the question, “What is the molecular weight of NaOH?”, let’s break it down step by step in a way that’s easy to understand for any chemistry student.

NaOH stands for Sodium Hydroxide, a commonly used compound in laboratories and industries. It is a strong base that plays a vital role in various chemical reactions like neutralization and saponification. The molecular weight (also called molar mass) of NaOH is calculated by adding up the atomic masses of its elements: Sodium (Na), Oxygen (O), and Hydrogen (H).

Answer: The Molecular Weight of NaOH

1. Atomic Mass of Sodium (Na): Sodium is represented by the symbol Na, and its atomic mass is approximately 23 grams per mole (g/mol).

2. Atomic Mass of Oxygen (O): Oxygen has an atomic mass of approximately 16 g/mol.

3. Atomic Mass of Hydrogen (H): Hydrogen, being the lightest element, has an atomic mass of approximately 1 g/mol.

4. Adding Them Together: The molecular weight of NaOH is the sum of these atomic masses:

Molecular Weight of NaOH = 23+16+1 = 40 g/mol

What Does This Mean?

The molecular weight of NaOH is 40 g/mol, meaning one mole of sodium hydroxide weighs 40 grams. This value is critical in chemistry for calculating concentrations, preparing solutions, and performing stoichiometric calculations in reactions.

For example, if you need to prepare a 1M (1 molar) NaOH solution, you would dissolve 40 grams of NaOH in one litre of water. Understanding molecular weight helps students and professionals alike in mastering laboratory techniques and theoretical chemistry.

So, the next time someone asks you about the molecular weight of NaOH, you’ll not only know the answer but also the science behind it!