KH2PO4 Molar Mass (With Calculations)

Molar mass of KH2PO4 is 136.084 g/mol.

Well, now you have come to know the molar mass of KH2PO4.

But how can you get this value?

Let me show you the calculation to get the molar mass of KH2PO4.

You can also refer to this one minute video which will show you the simple steps to calculate the molar mass of any compounds.

KH2PO4 Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of KH2PO4.

Because the molar mass of any molecule (or compound) can be calculated by simply adding the molar masses of individual atoms.

Now here we have to find the molar mass of KH2PO4.

So for that, have a look at the periodic table given below.

You can see the molar mass value of all the atoms from this periodic table.

Now in KH2PO4, there is 1 Potassium atom, 2 Hydrogen atoms, 1 Phosphorus atom and 4 Oxygen atoms.

So let’s look at the molar mass of Potassium, Hydrogen, Phosphorus and Oxygen from the above periodic table.

You can see that;

The molar mass of Potassium is 39.098 g/mol. [1]

The molar mass of Hydrogen is 1.008 g/mol. [2]

The molar mass of Phosphorus is 30.974 g/mol. [3]

The molar mass of Oxygen is 15.999 g/mol. [4]

Now, to calculate the molar mass of KH2PO4, you just have to add the molar mass of all the individual atoms that are present in KH2PO4.

You can see that in KH2PO4, there is 1 Potassium atom, 2 Hydrogen atoms, 1 Phosphorus atom and 4 Oxygen atoms.

So, Molar mass of KH2PO4 = Molar mass of 1 Potassium (K) atom + Molar mass of 2 Hydrogen (H) atoms + Molar mass of 1 Phosphorus (P) atom + Molar mass of 4 Oxygen (O) atoms.
= (39.098) + (1.008) 2 + 30.974 + (15.999) 4
= 39.098 + 2.016 + 30.974 + 63.996
= 136.084 g/mol

Hence the Molar mass of KH2PO4 is 136.084 g/mol.

I hope you have understood the short and simple calculation for finding the molar mass of KH2PO4.

Remember

• In some books, you may see the unit of molar mass as grams/mole or g/mole. But all these units (i.e g/mol, grams/mole and g/mole) are the same.
• Always follow the calculation order to avoid any mistakes in calculation. First solve the brackets, then multiplications and at last do the final addition.
• And don’t forget to put the unit g/mol to your final calculated molar mass.

Check out other related topics for more practice;
Na2O (Sodium oxide) Molar Mass
Diethyl ether [(C2H5)2O] Molar Mass
Ni(OH)2 Molar Mass
Uranium hexafluoride (UF6) Molar Mass
Acetate ion Molar Mass

Author
Jay Rana

Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. With a desire to make learning accessible for everyone, he founded Knords Learning, an online learning platform that provides students with easily understandable explanations.