You dissolve 280 g of sucrose (table sugar), C12H22O11(s), in 2.00 L of water.
a. Determine the number of moles of sugar in this solution.
b. Calculate the molar concentration of this solution.
I finished d. through h. of this question but I'm stumped here. help please! this is for a review before an exam so if you could explain the steps and not just write the answer that would be great, though Id appreciate any help at all
mols = grams/molar mass = 280/342 =
Molarity = M = mols/L = ? from above/2.00 = >>?
Well, well, well, looks like we've got ourselves a sweet question here! Let's tackle it one step at a time, shall we?
a. To determine the number of moles of sugar in the solution, we need to know the molar mass of sucrose. C12H22O11 is made up of 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms. The atomic masses of carbon, hydrogen, and oxygen are approximately 12 g/mol, 1 g/mol, and 16 g/mol, respectively.
So, to calculate the molar mass of sucrose, we multiply the number of each type of atom by their atomic mass and sum it all up. In this case, it's (12 × 12) + (22 × 1) + (11 × 16). Go ahead and grab your calculator, my brain can't hold that much information!
Once you've calculated the molar mass, you can then divide the mass of sugar by the molar mass to find the number of moles. That'll give you the answer for part a!
b. Now, let's move on to calculating the molar concentration. Molar concentration is given by the formula:
Molar concentration (mol/L) = Number of moles/Volume (in liters)
You already know the number of moles from part a and the volume of the solution is given as 2.00 L. So, divide the number of moles by the volume, and voila, you'll have the molar concentration!
Remember, my goal is to make you smile while helping you out. So, don't stress too much, and let's conquer this question together!
Sure! I'd be happy to help you with this question.
a. To determine the number of moles of sugar in the solution, you need to use the formula:
Moles = Mass / Molar mass
First, you need to find the molar mass of sucrose (C12H22O11). To do this, you multiply the atomic mass of each element by the corresponding subscript in the formula and then add them up. The atomic masses (in g/mol) are as follows:
C: 12.01 g/mol
H: 1.01 g/mol
O: 16.00 g/mol
So, the molar mass of sucrose is:
Molar mass = (12 x 12.01) + (22 x 1.01) + (11 x 16.00) g/mol
Now, you can calculate the moles of sugar using the formula mentioned earlier:
Moles = 280 g / Molar mass
Substitute the given values to find the answer.
b. The molar concentration of a solution is defined as the amount of solute (in moles) divided by the volume of the solution (in liters). In this case, you want to find the molar concentration of the sugar solution.
Molar concentration = Moles of sugar / Volume of solution
You're given that the volume of the solution is 2.00 L (in liters), which was stated in the question.
Substitute the value of moles of sugar, calculated in part (a), into the formula to find the molar concentration of the solution.
Make sure to use the correct number of significant figures in your final answer.
I hope this helps! Let me know if you have any further questions.
Sure! I'd be happy to help you with this question. Let's break it down step by step:
a. Determine the number of moles of sugar in this solution.
To find the number of moles of sugar, we need to first calculate the molecular weight of sucrose (C12H22O11).
The periodic table can provide the atomic weight of each element (C: 12.01 g/mol, H: 1.01 g/mol, O: 16.00 g/mol). The molecular weight of sucrose can be calculated by adding up the atomic weights of the elements in its chemical formula.
Molecular weight of C12H22O11 = (12.01 g/mol x 12) + (1.01 g/mol x 22) + (16.00 g/mol x 11)
Once you calculate the molecular weight, you can convert the given mass (280 g) of sucrose to moles using the formula:
Number of moles = Mass / Molecular weight
b. Calculate the molar concentration of this solution.
The molar concentration is defined as the number of moles of solute (in this case, sucrose) divided by the volume of the solution in liters.
Molar Concentration = Number of moles / Volume of solution
In this case, you dissolve 280 g of sucrose in 2.00 L of water, so we have both the number of moles and the volume of solution required to calculate the molar concentration.
I hope this explanation helps! Let me know if you have any further questions.