Test Day

So I can say for myself that I know I didn't do too well. I studied as hard as I could this past week and doing all these problems. However from Sunday night to Thursday morning I have about 10hrs of sleep in total. So I think my problem wasn't I didn't know the material but that I was sleep deprived therefore I couldn't remember anything well. Welp, better luck next time for me!

Titration Lab

I swore this lab was the death of me buttttttt I absolutely loved the lab!!! Probably just as fun as the Copper II Chloride lab! It's just this lab was about accuracy and precision (which I love!) but I just got stressed out because any little mess up or wrong measurement even by the 0.001 or not making sure the meniscus is exactly at zero before titatring can make your percent error increase. Yes it was stressful but I learned a lot in this lab. I learned how even one little drop of NaOH can make a faint pink solution to a bright fusia color that was really pretty. I learned how titration works by using a buret. I also learned that desks come in handy when you're too short to read the meniscus straight on and accurately!

Some pictures of the lab below! 

Acid Mystery Lab

This lab was on Monday and Tuesday of this week. It's basically like the previous lab we did but this time the acid is a solid. All in all this lab was just as tedious as the last one by that you need to be as precise as possible with all of your measurements. I loved this lab! Yes it's tedious and challenging but I'll take that lab over some silly lab even a 8 yr old could do. These labs help me learn so much and help me understand what we're doing in our lessons. It's putting the knowledge I was just taught and putting it into a real world example. I'm more of a hands on person in order for me to learn. I just learn better when I'm actually applying my skills. I hope we keep doing more labs like this because I've learned a lot about how acids and bases work in titration!

Quiz!

So the night before the quiz I made sure I knew everything by heart. Took a little bit, but it paid off in the long run! Yes Monday quizzes/tests are terrible just because it's on a Monday and Monday's are terrible in general. But I was glad it was on Monday because it gave me time to study all the practice problems in the packets. I was a little worried about the ICE Box questions just because there wasn't any practice problems in the packets. However I think it's fairly easy enough. I thought it was kind of funny how that day in chem (on Friday) we learned about using the quadratic equation in ICE Box questions and the same day in math analysis we relearned it in class! Funny how things work out! But all in all I felt confident about the quiz. If anyone needs help understanding anything, I'm open for questions!

Finding pH and pOH

Just some key notes here:
Remember the H+ is used to tell if a solution is acidic or basic. Low concentration of H+ means that the solution has a high pH (basic). However the higher the concentration of H+ means that the solution has a low pH which is considered acidic.

# of sig figs in concentration = # of decimal places for pH

At first I was confused how to get from concentration of H+ to pOH. In all honesty if you know the box chart you can do it on the top of your head. My tip for my fellow blog followers is to do TONS of practice problems with it. It helped me a lot!

Helpful Links Below!
Finding pH and pOH
Calculating pH & pOH, [H+], [OH-], Acids & Bases CLEAR & SIMPLE Video
Practice Problems

Intro to Acids and Bases

I would say the part I first struggled with in this unit is the difference between Arrhenius acids/bases versus Bronsted-Lowry acids/bases. Here's the difference!

Arrhenius acids: produces H+ ions in aqueous solutions   

Arrhenius bases: produces OH- ions in aqueous solutions 

Bronsted-Lowry acids: proton (H+) donor

Bronsted-Lowry  bases: proton (H+) acceptor

Key note: Bronsted-Lowry acids/bases are the ONLY ones with conjugate acid/base pairs 

Acids produces conjugate bases and bases produce conjugate acids. 

This basically means that when you have an acid that gives up a proton (H+) the conjugate base is just the remaining substance when a proton is lost from an acid. The conjugate acid of the base is the substance frmed when a proton is added to a base, 

Some important key notes:

-Water is amphoteric substance meaning it can act as an acid or a base. 

-Group 2 metals liberate twice as much OH- for bases 

-Strong acids/bases will have weak conjugate acids/bases

Helpful Links!

Acids and Bases Khan Academy 

Arrhenius acids and bases

Bronsted-Lowry acids and bases theory