Question
What would be the total mass of the products of a reaction in which 25 grams of table salt (sodium chloride) decomposes into the elements sodium and chlorine?
Can someone please help me with this?
Can someone please help me with this?
Answers
Aylin
I forgot to say, I believe the answer is 25 grams since mass can't be destroyed nor created but I just wanna make sure.
DrBob222
Your reasoning is very good and correct. You can prove it. To make the calculation easier I will use approximations like this.
2NaCl ==> 2Na + Cl2
molar mass NaCl is approx 58.5
Na is approx 23
Cl is approx 35.5
Starting with 25 g NaCl we will get
(25/58.5) x 23 = approx 9.8 g Na
(25/58.5) x 71 = approx 15.2 g Cl2
Total on the left is 25 and on the right is 9.8+15.2 = 25 g.
2NaCl ==> 2Na + Cl2
molar mass NaCl is approx 58.5
Na is approx 23
Cl is approx 35.5
Starting with 25 g NaCl we will get
(25/58.5) x 23 = approx 9.8 g Na
(25/58.5) x 71 = approx 15.2 g Cl2
Total on the left is 25 and on the right is 9.8+15.2 = 25 g.