A group of students do an activity with baking soda and vinegar. The steps of the activity are listed below:
Pour 100 g vinegar into a flask.
Measure the temperature of the vinegar.
Add 10 g of baking soda to the flask.
Observe as the contents of the flask fizz (produce bubbles).
Measure the temperature of the contents in the flask and observe any change in temperature.
What should the total mass of all the products of the reaction be? Show your calculations or explain your answer, and include units in your answer.

I reallt don't understand this :(

Question

A group of students do an activity with baking soda and vinegar.   The steps of the activity are listed below:
Pour 100 g vinegar into a flask.	                   
Measure the temperature of the vinegar.
Add 10 g of baking soda to the flask.
Observe as the contents of the flask fizz (produce bubbles).
Measure the temperature of the contents in the flask and observe any change in temperature.
What should the total mass of all the products of the reaction be?  Show your calculations or explain your answer, and include units in your answer. 


I reallt don't understand this :(

anonymous · Answer

@Abhisar @invinceble

abhisar · Answer

Hello @helpwithschool45 
Welcome to openstudy !

anonymous · Answer

Hiya :)

abhisar · Answer

Have you read Law conservation of mass?

abhisar · Answer

*Law of

anonymous · Answer

Yes. I know that states that for any system closed to all transfers of matter and energy and the fact that  the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed. However I just don't understand what they mean.

abhisar · Answer

Yes, actually they have given you the mass of reactants and want you to calculate the mass of products. As the mass is conserved, totla mass of the products will be the same as that of reactants....getting it ?

anonymous · Answer

Yea. I see :)

anonymous · Answer

So basically the product is the smae as the reactant

abhisar · Answer

Yes, but one point should be noticed. Here one of the products of the reaction is gas (that is why the brisk is formed) and it will evolve out of the flask. So while counting the total mass of the products you need to include the mass of the escaped gas too otherwse the mass of the products will be less than the mass of the reactants.

anonymous · Answer

ok let me think about this.

anonymous · Answer

OK I calculated and got 5g

abhisar · Answer

How ?

abhisar · Answer

Total mass of reactants = 100+10 = Total mass of products.

anonymous · Answer

@Abhisar  did I calculate this right ?

abhisar · Answer

It should be 110 g

abhisar · Answer

Getting it ?

anonymous · Answer

Can you explain how you got 110g please?

anonymous · Answer

I promise you I am almost done. i dont want to take up all your time .

abhisar · Answer

I already did, Total mass of reactants is equal to total mass of products by law of conservation of mass. What is the total mass of reactants?

abhisar · Answer

Vinegar and baking soda are the reactants in this case.

anonymous · Answer

Ok Im sorry my laptop is going very slow today

anonymous · Answer

I got it

abhisar · Answer

It's ok....very good..

anonymous · Answer

Thanks:) Umm how do I award you a metal? Its my first time on here