In the reaction 2Na + Cl2 → 2NaCl, how many grams of NaCl can be produced from 5

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Question: In the reaction 2Na + Cl2 → 2NaCl, how many grams of NaCl can be produced from 5 g of Na?

Options:

Correct Answer: 10 g

Solution:

5 g of Na = 0.217 moles. 2 moles of Na produce 2 moles of NaCl, so 0.217 moles of NaCl = 0.217 * 58.5 g = 12.7 g.

In the reaction 2Na + Cl2 → 2NaCl, how many grams of NaCl can be produced from 5 g of Na?

In the reaction 2Na + Cl2 → 2NaCl, how many grams of NaCl can be produced from 5 g of Na?

Step 1: Calculate the number of moles of Na in 5 grams. Use the formula: moles = mass (g) / molar mass (g/mol). The molar mass of Na is approximately 23 g/mol.
Step 2: Plug in the values: moles of Na = 5 g / 23 g/mol = 0.217 moles.
Step 3: Look at the balanced chemical equation: 2Na + Cl2 → 2NaCl. This shows that 2 moles of Na produce 2 moles of NaCl.
Step 4: Since 0.217 moles of Na is used, it will produce the same amount of NaCl, which is also 0.217 moles of NaCl.
Step 5: Now, calculate the mass of NaCl produced. The molar mass of NaCl is approximately 58.5 g/mol.
Step 6: Use the formula: mass = moles × molar mass. So, mass of NaCl = 0.217 moles × 58.5 g/mol = 12.7 g.

Stoichiometry – The calculation of reactants and products in chemical reactions based on balanced equations.
Mole Concept – Understanding the relationship between grams, moles, and molar mass in chemical calculations.
Molar Mass Calculation – Calculating the mass of a compound using its molar mass to convert moles to grams.