Question

what weight of MgO would be required to neutralise the hydrochloric acid in 250g of 20.0% of an aqueous solution of the acid by weight​

Answer 1

Answer:

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Explanation:

For the hydrochloric acid it is equal to 36.46 g/mol. Decide on the mass concentration of your substance - you can either input it directly or fill in the boxes for substance mass and solution volume. Let's assume that you have 5 g of HCl in a 1.2 liter solution. Convert the expressions above to obtain a molarity formula. As mass / volume = molarity * molar mass, then mass / (volume * molar mass) = molarity. Substitute the known values to calculate the molarity: molarity = 5 / (1.2 * 36.46 ...