I can't figure out this Chemistry question. Can someone help?
How many grams of Na2SO4 must be dissolved in 2000.0 mL of solution to produce a solution that is 4.0-M?
- davidLv 74 weeks ago
Roger's answer is probably correct, but I'm going to try to explain more.
... most of these problems start by doing the molar mass .... I will call that k (because M is used for something else.
M -- is molarity or concentration in moles / liters
=== now start canceling things
(4.0moles/1Liter) X (1L/1000mL) X (2000mL) X (k g/mole)
... sub the molar mass in place of k .. then just use a calculator .. --- good luck.
- Roger the MoleLv 74 weeks ago
(2.0000 L) x (4.0 mol/L) x (142.0421 g Na2SO4/mol) = 1136.34 g = 1100 g Na2SO4