Calculate the molarity of the nitrate ion in a 0.111 M solution of calcium nitrate?
so would I have to find the number of moles of (NO3)2 and then divide it by the 0.111 M to get the molarity of the nitrate ion I am so confused please explain the set up I don't want the answer just the steps to get the anser
You have 0.111M Ca(NO3)2. There are two mols NO3^- in 1 mole Ca(NO3)2. So.....
would i divide 0.111M by 2
No No NO.
there are two moles of nitrate ion for each mole of CalciumNitrate.
so if you started with .111moles calcium nitrate per liter, then you must have .222moles nitrate ion per liter.
Amber, you were close. You don't divide though when there are 2:1 ratio... you multiply. On the other hand, if the ratio were 1:2 (one for every 2) then you would divide by 2. Hope this helps!
To calculate the molarity of the nitrate ion (NO3-) in a 0.111 M solution of calcium nitrate (Ca(NO3)2), you are on the right track. Here are the steps to get the answer:
Step 1: Write down the chemical formula of calcium nitrate, which is Ca(NO3)2. This indicates that there are two nitrate ions for every calcium ion.
Step 2: Determine the molar mass of the nitrate ion (NO3-). It consists of one nitrogen atom (N) and three oxygen atoms (O). The atomic masses of N and O are 14.01 g/mol and 16.00 g/mol, respectively. Therefore, the molar mass of NO3- is (14.01 g/mol + (3 × 16.00 g/mol)) = 62.01 g/mol.
Step 3: Calculate the number of moles of calcium nitrate in the 0.111 M solution. The molarity (M) is defined as moles of solute per liter of solution. Since the molarity of calcium nitrate is given as 0.111 M, it means that there are 0.111 moles of calcium nitrate per liter of solution.
Step 4: Since there are two nitrate ions (NO3-) per molecule of calcium nitrate, you can multiply the number of moles of calcium nitrate by 2 to find the number of moles of nitrate ions.
Step 5: Divide the number of moles of nitrate ions by the volume of the solution (in liters) to obtain the molarity of nitrate ions. The volume is not explicitly given in the question, so you might need to refer to the context or assume a specific volume.
Note: The molarity obtained at this step will represent the concentration of nitrate ions (NO3-) in the solution.
By following these steps, you will be able to calculate the molarity of the nitrate ion in the given solution of calcium nitrate.