Answer:
We need 0.240 grams of NaOH
Explanation:
Step 1: Data given
Volume of a 0.150 M H2SO4 solution = 20 mL = 0.02L
Step 2: The balanced equation:
2NaOH + H2SO4 → Na2SO4 + 2H2O
Step 3: Calculate moles H2SO4
Moles H2SO4 = 0.0200 L * 0.150 M= 0.00300 moles
Step 4: Calculate moles NaOH needed
For 1 mol H2SO4 we need 2 moles of NaOH to neutralize
moles NaOH required = 0.00300 * 2 = 0.00600 moles
Step 5: Calculate mass of NaOH
Mass NaOH = 0.0600 moles * 40 g/mol
mass NaOH = 0.00600 moles * 40 g/mol = 0.240 grams
We need 0.240 grams of NaOH
