a. In the first solution, 1.2 kg of salt are dissolved in 5 liters of water.
b. In the second solution, 56 g of salt are dissolved in 200 mL of water.
Which solution is more concentrated?
OKay so I know hwo to find the molarity of things, but I can't find the molar mass. Can someone help me out?
2007-01-18 05:09:33 · 3 answers · asked by C. 2 in Science & Mathematics ➔ Chemistry
solution a concentration 1.2/5 =0.24 kg/l = 240g/l
solution b concentration 56 /0.2 = 280g/l
b is more concentrated than a
With these data, it is impossible to have the molar mass
2007-01-18 05:15:09 · answer #1 · answered by maussy 7 · 0⤊ 0⤋
salt is just NaCl. so you add the Mmass of 1 Na + 1 Cl and get the formula weight which is the molar mass of the compound
2007-01-18 05:13:00 · answer #2 · answered by shiara_blade 6 · 0⤊ 0⤋
You don't need molarity. Let salt be called S and let water be called W.
1.2kgS/5LW x 1000gS/1kgS = 240gS/L
56gS/200mLW x 1000mL/1L = 280gS/L
The second one is more concentrated.
2007-01-18 05:21:06 · answer #3 · answered by steve_geo1 7 · 1⤊ 0⤋