What mass of Na2SO4 is needed to make 2.5L of a 2.0M solution?

Question

(Na=23, S=32, O=16)a. 178g; b. 284g; c. 356g; d. 710(Please tell me how to solve this problem.)

Lorine Rath · Accepted Answer

Na(2) = 46S(1) = 32O(4) = 64that all adds up to 142 (this is the gFm, gram formula mass)/ = divided byM (molarity) = m (moles) / Liters (molarity formula)2 = m / 2.5moles = 5(moles formula)m = given mass / gram formula mass5 = gm / 142gm = 710 Remember: capital M = molarity, lowercase m = moles

Lorine Rath · Answer

first find the molecular mass of your compound by adding together the mass of the constituents.2 - Na = 46amu1 - S = 32amu4 - O = 64amualtogether = 142amu 1 mole of anything weighs = # of amu's in gramsso 142grams = 1 mole Na2SO4you need 2mol per liter to make a 2.0 M (M= mol/L)solution2M x 142g/L= 284g / per L for 2Myou have 2.5L so 2.5L x 284g/L = 710g

Lorine Rath · Answer

710 g - novanet

Lorine Rath · Answer

here you have to prepare 2.0M solution into 2.5L volume.the molarity required 2.0Mthe volume to be made 2.5Lmolarity definition: it is the number of moles of solute dissolved dissolved per litre of the solution.the solute is Na2SO4.one molar (1.0M) solution means one mole(one formula mass)of solute has been dissolved in one litre of the solution.the formula mass is the sum of atomic masses of all the atoms present in that compound,the formula mass of Na2SO4 = 2x Na + S + 4O = 2x23 + 32 +4 x16 =142g/moleif dissolve 142 g of above salt in one litre of water then it will give one molar solution,we require 2.0M so we need 2x142g salt per litre of the solution,the total volume is 2.5 litre so totally we have to take 5x142 g salt and dissolve in a suitable volume of water then make up to 2.5Lthat would be 5 x 142g = 710gFor more assistance please visit www.classof1.com.Classof1 - leading web tutoring and homework help.Toll free - 1877-252-7763

Lorine Rath · Answer

g=grams of saltmm=molar mass]M=molarityM=g/mm/L2=g/mm/2.5you put in the values!

Lorine Rath · Answer

how make .0094 na2so4

Major Spinka DVM

What mass of Na2SO4 is needed to make 2.5L of a 2.0M solution?

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