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  • University Of New England (UNE )
  • Chem 1020
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Chemistry 1020 Lab Final Questions With Complete Solutions

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Acid + Base - correct answer: Salt + Water Molarity (M) correct answer: Number of moles per liter Titration of Vinegar correct answer: First drops will cause brief appearance of pink that quickly fades Near endpoint, more of the flask will turn pink but still fade after a few seconds Endpoint When entire flask turns pink and stays that way without adding another drop Buffer correct answer: - Solution that resists a change in pH when a small amount of acid or base is added Ka = correct answer: a measure of how much an acid dissociates in water - Smaller Ka means weaker acid (less dissociation) pKa = correct answer: Negative log10(Ka) -Larger pKa means weaker acid (less dissociation) pH = correct answer: Negative log10[H+] Henderson-Hasselbach Equation correct answer: pH = pKa + log10 [salt]

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Chemistry 1020 Lab Final Questions With
Complete Solutions
Acid + Base -> correct answer: Salt + Water

Molarity (M) correct answer: Number of moles per liter

Titration of Vinegar correct answer: First drops will cause brief
appearance of pink that quickly fades
Near endpoint, more of the flask will turn pink but still fade
after a few seconds
Endpoint
When entire flask turns pink and stays that way without adding
another drop

Buffer correct answer: - Solution that resists a change in pH
when a small
amount of acid or base is added

Ka = correct answer: a measure of how much an acid
dissociates in
water
- Smaller Ka means weaker acid (less dissociation)

pKa = correct answer: Negative log10(Ka)
-Larger pKa means weaker acid (less dissociation)

pH = correct answer: Negative log10[H+]

, Henderson-Hasselbach Equation correct answer: pH = pKa +
log10 [salt]
[acid]

Hydrocarbons Contain only correct answer: hydrogen and
carbon

Hydrocarbon Classes correct answer: Alkanes
Alkenes
Alkynes
Aromatic

Prefixes correct answer:

Suffix correct answer: ane=Alkane
ene=Alkene
yne=Alkyne

Saturated correct answer: - All carbons joined by single bonds
• Alkanes

Unsaturated correct answer: - Some carbons joined by double or
triple bonds
• Alkenes
• Alkynes
• Aromatic

Different classes of hydrocarbons react differently correct
answer: Bromine:Deep brown to clear
Potassium permanganate (KMnO4): purple to clear

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