KMnO4:KCl = 1:1
HCl:H2O = 2:1
KMnO4:Cl2 = 2:5
HCl:MnCl2 = 8:1
It's pretty straightforward; the ratio of each substance pair is derived from their coefficients in a balanced chemical equation. Just don't forget to make them into their lowest terms.
How many mL of a 12.5% (by volume) solution of ethanol are required to produce 175 mL of 0.664 M acetic acid? (density of pure ethanol = 0.789 g/mL)
We have the following data:
% m1/m (percent by solute mass/solution mass) = 12.5
Molar Mass (MM) of ethanol (C2H5OH) ≈ 46.07 g/mol
M1 (molarity) = 0.664 M (or 0.664 mol/L)
V1 (initial volume) = 175 ml = 0.175 L
n (number of mol) = ?
m1 (solute mass - ethanol) = ?
m (solution mass) = ?
d (density of pure ethanol) = 0.789 g/ml
v (volume of pure ethanol) = ? (in ml)
[First Step] Let's find the number of moles or matter number, let's see:
[Second Step] We apply the data to the Molarity or Molar Concentration formula and find the mass of the solute (m1), let's see:
[Third Step] We apply the data to the formula of percent solute mass per solution mass and let's find the solution mass, let's see:
[Fourth Step] We apply the data to the density formula and let's find the volume of ethanol, let's see:
The volume is approximately 54.3 ml
Bake it at 350°F (175°C) for 50 minutes, until golden brown. Remove the pie from the oven, let it cool for a hot minute and then remove the tin foil and weights. Put the pie back into the oven for 10 minutes. Bake all pies in a rack fitted to the middle of your oven and at 350°F (175°C), always.