Question

How much malt sugar (C12H22O11) would you need to make a 4-M solution in water?

180 grams

4000 grams

342 grams

1368 grams

Answer 1

1368 grams.

Step-by-step explanation:

Molarity is defined as number of moles of solute present in one litre of solution. 1-M means 1 mole of solute is present in 1 litre of solution.

4-M solution means 4 moles of solute is present in 1 litre of solution.

Molar mass of
`C_(12)H_(22) O_(11)` =
`12 * 12 + 22 * 1 + 11 * 16 = 342` grams.

as molar mass of carbon,hydrogen and oxygen atoms are 12,1 and 16 grams respectively.

Since molar mass of
`C_(12) H_(22) O_(11)` is 342 grams,

1 mole of it weighs 342 grams and 4 moles of it weighs
`4 * 342 = 1368` grams.

Hence we need 1368 grams to make a 4-M solution of
`C_(12)H_(22) O_(11)`.

Answer 2

1368 grams

Step-by-step explanation:

Molar Mass of malt sugar (C12H22O11) = 342 g

Molarity= 342 g/ mol

so 1 molar solution contain = 342 g /Liter

4 Molar solution contain= 1368g / Liter