Before Class Monday, Oct. 3
- Watch the two videos below (16 min, 16 min)
- Complete the blank notes handed out in class. If you don’t have them, you can download them here.
- Make a comment below.
chemistry matters
exploring the pleasure of finding things out
chemistry matters 
In these videos I learned about a type of quantitative analysis (stoichiometry) known as titration/ volumetric analysis that allows us to analyze information about a solution using information about volume. I applied information about molarity, neutralization, BCA tables and molar ratios to solve problems using titration. I learned that the point where the 2 solutions you have are in such a ration that you have enough of the first solution for the second solution to react completely is known as the equivalence point. I also learned, in these videos, about how to approach analyzing a solution to predict products.
LikeLike
Today I learned how to find out moles and grams of a substance by using volume, instead of mass. Once the amount of moles needed for the reaction is found out for one substance, then a BCA table can be used to find out the moles of the substance in question. From there, the moles are left as is, or turned into grams or M.
QUESTION: In the second example problem, why did the OH group and the Hydrogen gas react to form H2O, instead of H3O?
LikeLike
I think its because Acid+Base always create salt+ water which is H2O but i am not sure though.
LikeLike
Mehedi, you and Yen are both correct in your answer to Amber. acid plus base creates h2o and salt, because a hydroxide group (OH-) has a negative one charge, and only needs one proton (H+) to balance out that charge.
LikeLike
From this video I learned about titrations and how to apply my previous knowledge of molar relationships and BCA tables to problems about volumetric analysis. I learned how to find the concentration of one compond by using information given to me about another compound.
LikeLike
I learned how to use the molarity and volume of a solution to find out the mass of a substance needed to neutralize the reaction. I also learned what equivalence point is.
LikeLike
I learned how to use molar relationships to solve a problem and how to solve a titration problem using the BCA table.I also learned how to predict the products using the information given in any problems.
LikeLike
In this lesson, I learn how to do solution stoichiometry, or more specifically, titrations (volumetric analysis). I used molar relationships and BCA table to help me find the mass/concenration/mole of a substance.
To answer Amber’s question: the H2O in the product was form using the H+ and the OH-. The subscript 2 in H2SO4 are there to balance out the compound (since SO4 have -2 charge). Therefore, when OH and H combine, it is already balance, no need to have another hydrogen in there. I hope that help!
LikeLike
I learned about titrations and how to apply stoichiometry into chemical analysis of solutions. I also learned what equivalence points are. ***molar relationships are key!!
LikeLike
i learned a different way to do stoichiometry instead of using dimensional analysis. I learned about titrations and how to solve them properly.
LikeLike
These videos taught me about titration/volumetric analysis. It that allows us to analyze information about a solution using information about volume. I also learned about the equivalence point and how to predict products in a solution.
LikeLike