A few days ago
aly

chemistry??

1. What is the % concentration of a solution prepared by dissolving 11,8g of NaCl in 800 ml of H20??

2.How many grams of K2SO4 must be dissolved and diluted to 175 ml to produce a solution that is 0,45 molar??

Top 1 Answers
A few days ago
Anonymous

Favorite Answer

1) no of moles =conc x vol

no of mole of NaCl = 11.8 / (23+35.5)

=0.2017094

0.2017094 = conc x 800/1000

conc = 0.2521368 mol /dm^3

conc of solution = 0.252 mol/dm^3

2) 0.45 = mass / mr

0.45 = mass [(2*k) + S + 4 (O)]

mass = 0.45 / [ (2K +S +4) ]

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