Question

The Cherry Kool Aid dispensed from the burette was prepared as per the package instructions. The suggested serving size of Kool Aid is 8.0 ounces. How many moles and grams of red 40 (MW=496.42g/mol) are found in a serving fo Cherry Kool Aid? ( HInt: Use the concentration of undiluted Kool Aid you determined in the lab= 0.092mM )

Answer 1

Answer –

We are given, volume = 8.0 ounce, molar mass of red 40 is 496.42g/mol

The concentration of undiluted Kool Aid you determined in the lab= 0.092mM

So, first we need to convert the given volume ounce to L

1 ounce = 0.02957 L

So, 8.0 ounce = ?

= 0.2366 L

We need to convert the concentration of undiluted Kool Aid mM to M

1 mM = 0.001

So, 0.092 mM = ?

= 0.000092 M

Now from the concentration and volume we can calculate the moles

So, moles of Kool Aid = 0.000092 M * 0.2366 L

                                = 2.18*10^-5 moles

Mass of Kool Aid = 2.18*10^-5 moles * 496.42 g/mol

                         = 0.0108 g

So, 2.18*10^-5 moles and 0.0108 grams of red 40 are found in a serving fo Cherry Kool Aid