(b) An unknown volume of 3.50 M potassium phosphate, K, PO, solution is added to 0.210 L of water to form a 0.700 M K3PO, solution. Calculate the molarity of potassium ions, K in the solution.

Explanation:

Hello!

In this case, since we know the initial and final concentrations and the added volume of water, we can write:

Which can be solved for the initial volume as follows:

It means that the final volume is:

Next, we compute the moles of potassium phosphate in solution:

Then, since 1 mol of potassium phosphate has 3 moles of potassium (K's subscript), we compute the moles of potassium ions:

Finally, the concentration of potassium ions turns out:

Regards!

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :