how many grams of sucrose are needed to make 100 ml of a 10^-2 Molarity sucrose solution?
You want 0.02 M. How many moles do you need? That will be M x L = 0.02M x 0.100L = 0.002 moles.
Then moles = grams/molar mass
You know mole and molar mass, solve for grams.
To determine how many grams of sucrose are needed to make a 100 ml of a 10^-2 Molarity sucrose solution, you'll need to know the molar mass of sucrose and the equation relating molarity, volume, and moles.
Sucrose, also known as table sugar, has a molar mass of approximately 342.3 g/mol.
The equation relating molarity (M), volume (V), and moles (n) is:
M = n/V
Rearranging the equation to solve for n:
n = M * V
Now, substitute the given values into the equation:
M = 10^-2 Molarity
V = 100 ml (convert to liters by dividing by 1000) = 0.1 L
Plugging these values into the equation:
n = (10^-2) * 0.1
n = 10^-3 moles
Finally, convert moles to grams using the molar mass of sucrose:
Mass = n * molar mass
Mass = (10^-3) * 342.3 g/mol
Performing the calculation:
Mass = 0.3423 grams
Therefore, you would need 0.3423 grams of sucrose to make a 100 ml of a 10^-2 Molarity sucrose solution.