Determine the number of moles of citric acid.
n of citric acid = (30 mL)(1 L / 1000 mL)(1 mol/L)
= 0.03 mol of citric acid
It is seen in the equation that each mole of citric acid reacts with 3 moles of baking soda.
n of baking soda = (0.03 mol of citric acid)(3 mols baking soda/1 mol of citric acid)
n of baking soda = 0.09 mol of baking soda
mass of baking soda = (0.09 mol of baking soda)(84.00661 g/mol)
mass of baking soda = 7.56 g of baking soda
Answer: 7.56 g
Joseph's percentage error would be 1.89%
<u>Explanation:</u>
Exact value of the density of aluminium = 2.699 g/cm³
Calculated value of the density of aluminium = 2.75 g/cm³
Percentage error = ?
We know:
Therefore, Joseph's percentage error would be 1.89%
The answer is d
The answer is d