A 360mg sample of sugar (molar mass of 180 g/mol) is dissolved in enough water to produce 200mL of solution. after the sugar is completely dissolved, you
pour 50mL of this solution into a Burnette for use in an experiment. what is the molar concentration of sugar in the sample
To find the molar concentration of sugar in the sample, we need to calculate the number of moles of sugar present in the 50 mL solution. Here's how to do it step by step:
1. Calculate the number of moles of sugar in the original 360 mg sample:
- Mass of sugar = 360 mg
- Molar mass of sugar = 180 g/mol
Mass of sugar in grams = 360 mg ÷ 1000 = 0.36 g
Number of moles of sugar = Mass of sugar / Molar mass of sugar
= 0.36 g / 180 g/mol
= 0.002 mol
2. Calculate the molar concentration in the 50 mL solution:
- Volume of solution = 50 mL = 50 cm³
- Molarity (M) = number of moles / volume in liters
Volume in liters = 50 cm³ ÷ 1000 = 0.05 L
Molar concentration of sugar = Number of moles / Volume in liters
= 0.002 mol / 0.05 L
= 0.04 M
Therefore, the molar concentration of sugar in the 50 mL solution is 0.04 M.
and 50 mL ? thanks
(360 / 180) moles / .200 L = 10 M
the concentration is 10 Molar
sample size is not a factor