lorine was the first of the halogens to be isolated. C. Vw 21, Scheele carried o
ID: 578941 • Letter: L
Question
lorine was the first of the halogens to be isolated. C. Vw 21, Scheele carried out the following reaction in 1774 «NaCl (aq) + 2H,so, (aq) + Mno, (s)- 2NaSO, (aq) +MnCI, (ag)+2H,O(+ Cl, (g). a. If you start with 1.00 g NaCI and an excess of the other reactants, how many grams of Cl, will be produced? b. If you start with 1.0 g H,SO, and an excess of the other reactants, how many grams of Cl, will be produced? c. If you start with 1.0 g MnO, and an excess of the other reactants, how many grams of Cl, will be produced? d. How many grams of NaCI must react to produce 1.00 g ci,? e. How many grams of H,SO, must react to produce 1.00 g f. How many grams of MnO, must react to produce 1.00 g g. How many grams of Na,SO, will be produced along with h. How many grams of MnCl, will be produced along with Cl,? 1.00 g Cl? 1.00 g Cl? How many grams of H,O will be produced along with 1.00 g Cl i. j. Show that the law of mass conservation is upheld in production of 1.00 g CL.Explanation / Answer
j. 4NaCl + 2H2SO4 + MnO2 = 2Na2SO4 + MnCl2 + 2H2O + Cl2
(4x58.4g 2x98g 86.93g) (2x142g 125.84g 2x18g 70g)
(233.6g 196g 86.93g) (284g 125.84g 36g 70g) (i)
516.53g 515.84g
Now for making 1g Cl2 just divide (i) by 70 and then add total masses on both sides to prove the validity of the Law of Conservation of Mass.
(233.6g 196g 86.93g) (284g 125.84g 36g 70g) [Dividing by 70 on both sides)
(3.33g 2.8g 1.24g) (4.05g 1.80g 0.51g 1g)
Adding both reactant masses and product masses:
(7.37g) (7.36g) Hence Law of Conservation of Mass is valid.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.