Knowing that the solubility of a salt at 80°C is 45g/100 g of H, O, calculate the mass of water required for dissolve 250 g of this salt at 80º C.

The mass of water required will be approximately .

45g of salt 100g of H₂O

250g of salt x g of H₂O

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answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

b. is the answer hoped i