Week 11 – 11/8 – 11/12
Jump to: Tuesday, Wednesday, Thursday, Friday
11/8 – Monday – A Day – 2/3a Lab, 4
a) To define Lewis acid/base definition and weak acid /base equilibria
b) To introduce the auto – ionization of water, pH, pOH, Kw, -log, 10-x
Period 2/3:
1. Complete the Lewis acid/base definition in explaining the CO2.
2. Review weak acid/base equilibria
Conjugate Acid Base Pairs and Complex ions new key p.pdf
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Classwork:
Acid and Bases Intro packet new.pdf
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Period 4:
1. Complete the Lewis acid/base definition in explaining the CO2.
2. Review weak acid/base equilibria / homework
Notes for today:
This is the mechanism of how CO2 acts an acid by the the Lewis Definition.

CO2 acts an acid by the the Lewis Definition.
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C2H2 (g) + 5/2O2 (g) —> 2CO2 (g) + H2O (g) 0r
2C2H2 (g) + 5 O2 (g) —> 4CO2 (g) + 2H2O (g)
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CaC2 (s) + 2H2O (l) —–> C2H2 (g) + Ca(OH)2

The result of this acid base reaction is that acetylene C2H2 was produced. Notes for auto – ionization of water:
Auto-ionization of water lesson – today’s Lecture and also part of tonights homework.
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11/8 – Monday Homework: –
Answers for question in notes above.
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11/9 – Tuesday – B Day – 2, 3b/4 Lab
a) To calculate the hydronium or hydroxide concentration from pH.
b) To calculate the pH of a strong acid or strong base from its molarity.
b) To identify an acid/base indicator as a conjugate acid /base pair.
Period 2:
Acid Bases Packet Intro Key 1718 p.pdf View Download
Period 3/4:
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Acid Base Indicators Presentation:
Today’s lesson – today’s Lecture
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11/9 – Tuesday Homework: –
1. Please complete the SIDE 1 –
Side 2 is about stoichiometry problems using acid base chemistry.
End Of Tuesday..
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11/10 – Wednesday – A Day – 2/3a Lab, 4
a) To write a net-ion reaction for an acid base reaction.
b) To Identify ions in salts that are acidic, basic, or neutral.
c) To perform stoichiometry calculations in acid/ base reactions.
Period 2/3:
1. Quick discussion in identifying acid, basic, or neutral salts using the acid/ base definitions.
2. Take the Acid/Base RAT.
3. Review of Last nights Homework.
Stoichiometry 5a – Acid Base Reactions new Key.pdf
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Period 4: –
1. Quick discussion in identifying acid, basic, or neutral salts using the acid/ base definitions.
2. Complete the Acid/Base RAT.
Notes for acid/ base salts:
Ionic compounds will dissociate into their cations (+) and anions (-) IF THEY ARE SOLUBLE and when they do they can act as either a base or an acid (or not react at all) in water. If the ions of the salt act as an acid or base they can ionize water as either a hydronium ion (H3O+) or as a hydroxide ion (OH–) by following our acid/base definitions.
For example if we have the following soluble salt: NH4Cl
NH4Cl —-> NH4+ + Cl–
NH4+WILL IONIZE Water :
NH4+ + H2O —-> H3O+ + NH3
Since we are increasing the hydronium ion the pH drops and ammonium chloride is an acidic salt.
For example if we have the following soluble salt: Na2CO3
Na2CO3 —-> 2Na+ + CO3-2
CO3-2 will ionize water:
CO3-2 + H2O —-> HCO3-1 + OH–
Since we are increasing the hydroxide ion the pH increases and sodium carbonate is Basic salt!
What about these expensive pool chemicals????
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11/10 – Wednesday Homework: –
Review of the First Acid / Base RAT –
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11/11 – Thursday – Veterans Day – OFF – enjoy!

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11/12 – Friday – B Day – 2, 3b/4 Lab
a) To write a net ion reaction in an acid/base reaction
b) To calculate the volume of base or acid needed to completely neutralize.
Period 2: –
1. We will start and complete the RAT 2 on acid/base basics
2. Test 2 will be handed back. The key is posted in powerschool. There are points I want make about this test that I will on Monday.
Period 3/4: –
1. We will start and complete the RAT 2 on acid/base basics
2. Test 2 will be handed back. The key is posted in powerschool. We will review this test.
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11/12 – Friday Homework: – Make sure you refresh this page to make sure you have the current version!!!!
1. Please review your test 2 with the key posted in Power School.
2. Please complete the Pre -Titration worksheet and review with the key. Remember that in an Acid/Base titration you need to match every OH- with a H+ and this is called neutralization. WE also call it reaching the ” equivalence point” (with pH probes) and the “end point” if we use acid/base indicators.
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Table M ![]() |
Do not forget that these indicators are themselves conjugate acid base pairs in equilibrium.
In the case of Thymol blue ![]() |

Notice in the first Titration which you should recognize as a strong acid / strong base titration, with a pH of the equivalence pH of 7, can utilize both Thymol blue and Methyl red as indicators as the endpoints will be on the asymptotic line. They would have endpoints with approximately the same volume as the equivalence point. The titration on the right is a Strong Base/weak acid concentration that we will study and do in lab next week. NOTICE THE ENDPOINT IS NOT AT A pH of 7 in this case!
3. Acid /Base pH Titration Intro lesson:
5. Lab 10 Preview – Strong Acid/Base Titration:
End of Quarter 1!