Question

Calculate the amount of glucose required to prepare 250g of5% solution if glucose by mass plzzz help me with the full solution...

Answer 1

hi,

 we just hav to apply the formula here :)

its given that 

 mass of solution = 250 g

concentration of solution = 5%

let mass of solute =x

we knw dat concentration % = mass of solute / mass of solution * 100

            ie,5 = x / 250 * 100

              by rearranging it we get x = 12.5g

x = mass of solute = mass of glucose = 12.5g

hope its clear...brainliest plz :)

Answer 2

Molar mass of glucose = 180.156 g/mol

Assuming this is 5% by mass (m/m) since it wants 250 g of solution, then...

5% of 250 grams = 0.05 x 250 g = 12.5 g of glucose

250 g - 12.5 g = 237.5 g of solvent 

Assuming the solvent is water:  12.5 grams of glucose + 237.5 grams of water = 250 g of solution that is 5% by mass glucose.