Question

For practice, the molecular formula for ascorbic acid is C6H8O6, and you used 6 g in this experiment, calculate the molarity of the ascorbic acid. Now calculate the concentration in moles per drop (assume 1 mL = 20 drops).

I do not want the answer. I want to know how to get the answer please. Just explain to me how to figure this out.

Answer 1

0.68 M

Step-by-step explanation:

The concentration of a solute refers to Molarity=
`(moles)/(Liter)`

We need to find moles, we can do that by using stoichiometry to convert 6g > moles using molar mass.

Molar mass of C6H8O6= 176 g/mol; this is our key to converting the amount we have to moles.

6g C6H8O6 x
`(1 mol)/(176 g)`C6H8O6 = 0.034 mol C6H8O6

Now we need our volume per drop.

We know 1000 mL=1 L

We have 20 drops per 1 mL, so 1 mL / 20 = 0.05 mL per drop. But we need Liters, so we'll convert it to Liters.

0.05 mL x
`(1 L)/(1000mL)` = 0.00005L

Now we can solve for Molarity.

Molarity of C6H8O6 =
`(0.034 mols)/(0.00005 L)` = 0.068M of C6H8O6