Question

Ethanedioic acid is a solid at room temperature. Calculate the mass of ethanedioic acid (H₂C2O4) needed to make 250 cm³ of a solution with concentration 0.0480 mol/dm³ Relative formula mass (M): H₂C2O4 = 90​

Answer 1

Answer: 1.08g

Explanation:

Concentration = Moles/ Volume

Moles = Concentration x Volume

Moles = 0.048 x 250/1000

Moles= 0.012

Moles= Mass / Relative Formula Mass

Mass = Moles x Relative Formula Mass

Mass = 0.012 x 90

= 1.08g

Answer 2

To calculate the mass of ethanedioic acid needed to make 250 cm³ of a solution with a concentration of 0.0480 mol/dm³, we need to use the formula:

mass = concentration * volume * relative formula mass

First, let's convert 250 cm³ to liters (dm³):

250 cm³ = 250 cm³ / 1000 = 0.250 dm³

Now, we can use the formula to calculate the mass:

mass = 0.0480 mol/dm³ * 0.250 dm³ * 90 g/mol = 11.16 g

So, 11.16 g of ethanedioic acid is needed to make 250 cm³ of a solution with a concentration of 0.0480 mol/dm³.