4.6 • 612 Ratings
🗓️ 29 October 2024
⏱️ 46 minutes
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Acids and bases are foundational topics in chemistry, crucial for understanding various biological and chemical systems you'll encounter in the MCAT.
In this episode, host Sam Smith discusses the selection and use of indicators in titrations to the pH at the equivalence point and the importance of buffers in maintaining physiological pH levels. You'll learn about the Henderson-Hasselbalch equation, the blood buffer system, and how to tackle common problems involving acids and bases. Plus, we'll break down strong and weak acids and the significance of their dissociation constants. This episode also shares tips on calculating pH, using ICE tables for weak acid problems, and converting between pH, pOH, and ion concentrations.
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(00:00) Intro
(02:16) Basic definitions of acids and bases
(11:33) Calculating pH
(24:55) Titrations
(35:26) Buffers
(41:16) Blood buffer system
(45:25) MCAT advice of the day
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0:00.0 | Welcome to MCAT Basics, your ultimate guide to the essential topics you need to master for the MCAT, |
0:08.0 | brought to you by the physicians at Med School Coach. |
0:11.0 | Every week, Sam Smith breaks down high-yield MCAT topics, ensuring you're primed for success on test day. |
0:17.0 | Join Sam as we explore the most crucial subjects outlined by the AAMC, pulled from official practice materials and third-party resources. |
0:25.0 | Get ready to elevate your MCAT game with topics tailored to maximize your score potential. |
0:30.2 | Hello, I'm Sam Smith. |
0:32.7 | This lesson covers Asses and Bases, and it covers a pretty wide range of topics within asses and bases. |
0:40.2 | So I'm going to cover the basic definitions of acids and bases, talk about calculating pH, |
0:46.6 | then I'll cover titrations, then buffers. And lastly, I'm going to talk about the blood buffer |
0:51.9 | system that keeps your body and homeostasis, |
0:55.5 | keeps your blood pH at about the same level. |
0:59.3 | And acids and bases will be seen on two out of the four MCAT sections. |
1:04.2 | They'll be seen on the chemical and physical foundations of biological systems, as well as on |
1:09.7 | the biological and biochemical foundations of living systems. |
1:13.6 | And I just want to know that some of this information is very, very basic. |
1:17.0 | So this will bring you all the way back to freshman introchem. |
1:21.3 | But with that said, it's still very important. |
1:24.2 | Make sure you know all these definitions, all these ideas, you know, like the back of your hand. Make sure you really have all this stuff down. Yeah. So very basic, |
1:33.8 | but this will be a good review of all these basic topics. So the first thing I want to start with is some of the basic definitions of acids and basics. |
1:51.1 | So the first definition was put out by aranus, or aranius, and he defined an acid as any species that increased the concentration of |
2:06.1 | hydrogen ions in aqueous solution and on the flip side of that is the iranus base which is any |
2:13.6 | species that increases the concentration of hydroxide which is is OH minus in aqueous solution. |
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