Elements and Compounds

One mole of Nacl is how many grams and how?

Answer

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07/19/2010

Mole = Mass/RMM

Ar for Na=23 & Ar for Cl = 35.5

Therefore 1mole = Mass / (35.5+23)

1 mole of NaCl is 58.5g

Mole = Mass/RMM

Ar for Na=23 & Ar for Cl = 35.5

Therefore 1mole = Mass / (35.5+23)

1 mole of NaCl is 58.5g

But that can be misleading. NaCl does not form into molecules (and salts in general do not). If you dissolve 58.5g of NaCl into water, it will dissociate into ions, and there will be 2 moles of particles in solution: 1 mole of Na+ ions, and 1 mole of Cl- ions. Knowing that will be important for calculating various things, such as how many degrees the freezing point will be depressed, when you dissolve so much salt in so much water.