[sfgiants13]

When delivering 10 mL of water from the graduated cylinder to the vial, the masses of water actually delivered for each of your 5 trials were: 10.149 g, 9.947 g, 9.880 g, 9.705 g, and 9.656 g. Calculate the average volume of water dispensed and the standard deviation of your measurements. Assume the temperature of the water is 25 ̊C and the density is 0.99704 g/mL.

My answers were 9.8674 ml and .1771 for the deviation, but both are wrong.

If the mass of sucrose you add to the beaker is 11.919 g, what volume of water must you add to make a solution that is 25.00% by weight sucrose? Assume the density of water is 1.000 g/mL.

35.76 is right

c) When you add water from your graduated cylinder to the grams of sucrose in part b, the total mass of the sucrose + water is 46.448 g. What is the actual % sucrose of your solution? From the table of sucrose densities provided in your lab manual and with the online lab information, what is the density of your solution? To use the table of densities, find the weight percent closest to your calculated value (you can also interpolate values from the table below).

% sucrose is 25.661 is right
density I can't figure out

[Naumans]

show some of your own work

[JGK]

for the mean and SD, look at the units you are given and the units you need for the answer.


I can't help with the last part as I don't have a copy of your Lab manual or the online lab information.