Question

I just need clarification on what are they asking me.
Please help! giving medals

Answer 1

If you could measure the mass of the substances inside the cup in Part I before and after the reaction, you would see that the mass decreased over the course of the reaction. Based on your observations in Part I and II, explain this difference in mass for the unsealed cup.

Answer 2

this was an experiment from vinegar and baking soda

Answer 3

Hello @gahm8684 !
Do you know about law of conservation of mass in a chemical reaction ?

Answer 4

yepe
matter cannot be created or destroyed by ordinary chemical or physical changes.

Answer 5

i also might have problems understanding the question because English is not my first language and when i put the question in the translator it doesn't gives me a good translation

Answer 6

Ok, so the question asks you to explain the possible reason of mass loss in the activity. Does that make sense to you ?

Answer 7

mass loos in the activity means why the mass of total content before the reaction is greater than that of after reaction.

Answer 8

so i say like: In part 1the cup was heavier and then in part 2 when i combined the reactions it got hevier

Answer 9

I need to know the exact reaction you are dealing with.

Answer 10

baking soda with vinegar

Answer 11

http://safeshare.tv/w/KzBySTmJFG

Answer 12

and this "part 2" http://safeshare.tv/w/iLLbOGuszl

Answer 13

ok, Following is the chemical reaction

\(\sf NaHCO_3(s) + CH_3COOH(l) → \color{blue}{CO_2}(g) + H_2O(l) + Na^+(aq) + \\ CH_3COO^-(aq)\)

Answer 14

You will see that weight of total content in the unsealed cup gets reduced after the completion of the reaction. The question asks you to explain the reason of this observation [which looks like contradicting the principle of conservation of mass in chemical reaction]

Answer 15

Explanation:
One of the product formed after reaction is \(\sf CO_2\) which is in gaseous state. Now as the cup is unsealed, it escapes into the atmosphere. Due to this loss in mass is observed. So basically there is no contradiction to the conservation of mass principle.

Answer 16

oohhh so i would say that it is contradicting the law of conservation of mass because mass is being destroy and the law of conservation of mass says that matter cannot be created or destroyed

Answer 17

No !Read it again...read the second reply

Answer 18

nevermind now i get
Thank you so much!!!!!

Answer 19

\(\rlap{\color{blue}{\huge\bigstar}\huge \color{blue}{ \text{You're Most Welcome! }}\color{blue}\bigstar}{\; \color{aqua}{\huge\bigstar}\huge \color{aqua}{\text{You're Most Welcome! }}\color{aqua}\bigstar}\)
\(~~~~~~~~~~~~~~~~~~~~~~~~~~~\color{green}{\huge\ddot\smile}\color{blue}{\huge\ddot\smile}\color{pink}{\huge\ddot\smile}\color{red}{\huge\ddot\smile}\color{yellow}{\huge\ddot\smile}\)

Answer 20

:3