Strong Acid / Strong Base Titration Curve - All pH Calculations

🧠 For all my science videos and resources: www.justinmsiebert.com​/science
💻 My youtube channel: / siebertscience​
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In this video, I calculate the pH at various points along a strong acid - strong base titration curve.
0:00 Calculating Equivalence Point Volume
1:49 Initial pH
2:34 pH Before the Equivalence Point (5mL)
5:46 pH Before the Equivalence Point (20mL)
7:34 pH at the Equivalence Point
9:19 pH After the Equivalence Point
11:12 Summary
🧪 Video: WEAK Acid / Strong Base Titration pH Calculations: • Weak Acid / Strong Bas...
🧪 Video: How to Perform a Titration with Vernier Drop Counter and pH Sensor: • How to Perform a Titra...

[@parttimenerd6276]

Thank you so much for the video, You saved me! I hope you keep making videos like this and help more students!

[@Bellabeautylove]

This was SO HELPFUL thank you so so much!

[@user-hs8yd2lc7y]

Excellent explanation!

[@jasminevo5367]

Very helpful! Thank you so much!

[@user-xl6gp2im2e]

thank you for this amazing and helpful video

[@hikari508]

Thank you so much, this is very helpful for my analytical chem assignment

[@XimiBell]

This helped a lot!

[@user-gc9xu4zd1l]

This is perfect 👏 good job dude

[@bekayadeta6230]

Thank you teacher ,so cool

[@JohnsonBartee-em7qg]

Thanks for so much 🙏

[@BgGroom]

no, for the longest time I've been having a hard time understanding acids and bases in general :C as if there is a really basic concept I dont know off or understand but great vid

[@AstrabhaRTRD]

Thanks a lot

[@isydoyle]

thank you so much!!!!

[@emmakistner6997]

THANK YOU!!!

[@hjaslhzvc]

THANK YOU

[@JohnsonBartee-em7qg]

Nice video

[@janinegumela6302]

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[@Trynnagetmydegree__]

Nice! Just a quick question, does the calculation of the half equivalence point apply here as well or is it because we're dealing with a SA and SB that it wouldn't matter

[@mauquiroz]

Thank you! really nice video. Quick question: do you ever factor the water generated in the acid-base neutralization as part of the final volume to determine molarity of the acid (in this case) or is it too small and is never taken into account?

[@SiebertScience]

I’ve never factored it in…I assume it’s negligible.
Also, it could reduce the volume potentially, since a hydrogen ion and a hydroxide ion combine to make each water molecule…It depends on whether two ions or one water molecule takes up more space in solution.
Either way, it would be a very small change, if any change at all.

[@oxdee4575]

Hi.
What is Raw voltage?

[@abripri]

True

[@edmundmarinelli5294]

After the equivalence point you switch to calculating the hydroxide concentration. It would seem that there should be a single equation that would provide all of the pH values . The problem is that when you get to past equivalence the 'apparent' hydrogen ion concentration is negative, which of course is wrong. So my question is : Is there a single equation which would provide the pH, or the hydrogen ion concentration through the entire range?

[@beatriceines3456]

This is because hydroxide and hydronium actually cannot be in the solution at the same time. This is because when they are together, they just make water. I used to think that pH was a measure of a ratio between hydroxide:hydronium but my chem prof said it isn’t. At 4:38, the added hydroxide ions are completely used up because they reacted with the hydronium ions to form water. This is why later on we switch to finding pH from the hydroxide (OH-) instead of the hydronium (H+); because now there are so much more OH- that the H+ is being completely used up

[@looprecorder]

Hi! Any way you could clarify why you use the BAA table rather than the ICE table in these titration questions? Can't seem to wrap my head around that even though I'm sure the answer is simple. Thanks so much!

[@SiebertScience]

The BAA table is a stoichiometry calculation to determine how much acid or base is left over after they neutralize each other. Whenever you add an acid and a base, you can use the BAA table first.
The ICE table is for when there is an equilibrium happening. If there is leftover H+ or OH-, you don’t need one. But if there is weak acid or base present, the ICE table (or HH equation, which is an ICE table shortcut) helps you determine the concentrations.

[@looprecorder]

@@SiebertScience Thanks for answering! So to make sure I’ve got it, the BAA table is used for this reaction because it’s not in equilibrium?
(I’m trying to teach myself chemistry, this resource is great, just stuck on this part!)

[@siebertcollegiate]

@@looprecorder Even if there is an equilibrium, you'd still need a BAA table any time you're mixing an acid and a base together.
If you watch my Weak Acid / Strong Base Titration video, you'll see that we still do a BAA table for most points in the titration, followed by an ICE table (or Henderson-Hasselbalch, which is an ICE table shortcut).

[@looprecorder]

@@siebertcollegiate that’s on my watch list tonight! Thanks so much!

[@leenkhaled6499]

Wowwwww

[@anushashringi5458]

How do you know what is the equivalence point -> when you are given a question that doesn’t give a graph like your video had

[@SiebertScience]

Use MaVa = MbVb, like I did in the first step of the video. You can calculate the equivalence point volume with that equation.

[@linlat3648]

❤

[@shamsshine5260]

if the volume is in millimolar should if first convert it to ml?

[@SiebertScience]

Yeah, convert from millimolar to molar first in that case.

[@shamsshine5260]

Thank you Sir@@SiebertScience

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We don't deserve you, hero

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It's no po