Acids and Bases 2.1.4 Flashcards
7 Properties of Acidic solutions:
-turns litmus paper red
-pH is less than 7
-Contains H+
-neutralizes some alkalis or bases
-reacts with some metals
-turns universal indicator red
-reacts with carbonate to give C02 gas
Formula for Hydrochloric Acid=
HCl
Formula for Nitric Acid=
HNO3
Formula for Sulphuric Acid=
H2SO4
Formula for Ethanoic Acid=
CH3COOH
Using the Bronsted Lowry definition, Define Acid
- An acid is a proton (H+) donor
Using the Bronsted Lowry definition, Define base
- A base is a proton (H+) acceptor
A base is a compound that
Neutralizes the acid to form a salt
Using the Bronsted Lowry definition, define Alkali
A type of base that dissolves in water forming hydroxide ions (OH-) ions
What do acids do in aqueous solution
Acids release H+ ions in aqueous solution
What is a strong acid
Fully dissociates in solution to produce H+ ions
What is a weak acid
-Weak acids are in equilibrium; they only partially dissociate in solution to produce H+ ions
Give an example of a weak acid
Carboxylic acids
What are examples of bases
Examples of Bases are metal oxides and metal hydroxides
How do metal oxides and metal hydroxides become alkalis
if these become soluble then they are known as alkalis
Define alkali
An alkali is a type of base that dissolves in water forming OH- ions
What is a strong base or alkali since its dissolved in aqueous solution
Strong alkalis completely dissociate in solution to produce OH- ions
What is a weak base or alkali since it does dissolve in solution
Weak alkalis are in equilibrium; they partially dissociate in water to produce OH- ions
Give an example of a weak alkali
Aqueous ammonia, amines
Give an example of a weak base
Aqueous ammonia, amines
Name the common alkalis
Sodium hydroxide
Potassium hydroxide
Aqueous Ammonia
Hydroxide
What are the formulas of the common alkalis
Sodium hydroxide= NaOH
Potassium hydroxide= KOH
Aqueous Ammonia= NH3
Hydroxide= OH-
Name some common bases
Calcium Oxide
Copper Oxide
Magnesium Oxide
What are the names and formulas of the common bases
Calcium Oxide = CaO
Copper Oxide = CuO
Magnesium Oxide = MgO
What are common bases known as
Metal oxides
What are common Alkalis also known as
Metal hydroxides
Acid+ ammonia= what
Acid+ ammonia–>Ammonium salt
What is a neutralization reaction
Neutralization reactions involves the transfer of a proton- the acid donates a proton and the base accepts a proton
Give an example of a neutralization reaction
H+ + OH- = H20
How is a salt formed
A salt is formed when a metal ion or an ammonium ion replaces the H+ in an acid
What is a salt
The product of a reaction in which the H+ ions from the acid are replaced by metal or ammonium ions (ionic compounds)
HCl + NaOH—-> H2O + NaCl
is an example of what type of reaction
Acid+ base/alkali—-> Salt+ Water
Acid+ metal= ?
Acid+ metal—>Salt+ hydrogen
Acid+ metal oxide = ?
Acid+ metal oxide–> Salt+ water
Acid+ metal hydroxide = ?
Acid+ metal hydroxide—> Salt+ water
Acid+ metal carbonate= ?
Acid+ metal carbonate—-> Salt+ water+ Carbon dioxide
Hydrochloric Acid= ?
Hydrochloric Acid= Chloride
Sulphuric Acid= ?
Sulphuric Acid= Sulphate
Nitric acid= ?
Nitric acid= Nitrate
Ethanoic Acid= ?
Ethanoic Acid= Ethanoate
What is ethanoic acid also known as
Vinegar
Give examples of common bases
metal oxides
MgO
CaO
CuO
Give examples of common bases
metal carbonates
Na2CO3
CaCO3
CuCO3
Give examples of common bases
that dissolve in water to produce OH- ions (Alkalis)
NaOH
KOH
NH3
What is the formula for sodium chloride
NaCl
What is the formula for sodium sulphate
Na2SO4
What is the formula for Calcium Nitrate
Ca(NO3)2
What s the formula for Ammonium ethanoate
CH3COONH4
Sulphuric acid is a strong acid but this is only true for…
one of the two hydrogen atoms.
What happens to the H2SO4 molecule when mixed with water
It dissociates releasing just one of its two hydrogen atoms as an H+ ion
Do Summary Questions 1 a, 1b, 2a and 2b in Kerboodle Year 1 AS textbook
Page 42, answers are at the back on page 274
Do Summary Questions 3 in Kerboodle Year 1 AS textbook
Questions= Page 42
Answers are at the back on page 274
Do Summary Questions 4 in Kerboodle Year 1 AS textbook
Questions= Page 42
Answers are at the back on page 274
Acid+ Carbonate—> Salt+ Water+ Carbon dioxide
What observations would be made in this reaction
Observations: In Carbonate reactions there will be Effervescence due to the CO2 gas evolved and the solid carbonate will dissolve
Give an example of an inorganic common acid
HCl
H2SO4
HNO3
Give an example of an organic common acid
Carboxylic acid (ethanoic acid)
Phenol (reacts as an acid in some reactions)
Give an example of inorganic common bases
metal oxide, metal hydroxide, metal carbonate, ammonia
Give examples of organic common bases
amines (ethylamine)
acid + ammonia——>
Ammonium Salt
Acid + Amine —–>
Salt
What is a displacement reaction
A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of its ions
Write a displacement reaction for:
Metal+ acid—-> salt + hydrogen
( reactive metal must be above hydrogen in reactivity series)
Use Hydrochloric acid and Zinc as an example
2 HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)
For a displacement reaction to occur the metal must be above what in the reactivity series
For a displacement reaction to occur the metal must be above Hydrogen in the reactivity series
Write a displacement reaction for:
Metal+ salt—-> salt + metal
( reacting metal must be above metal ion in reacting salt in reactivity series)
For a displacement reaction to occur the reacting metal must be above the metal ion in reacting salt in reactivity series
True or False
True
For a displacement reaction to occur the reacting halogen must be what
For a displacement reaction to occur the reacting halogen must be more reactive than the halide ion in the reacting metal halide
Write a displacement reaction for:
Halogen+ metal halide—-> metal halide + halogen
( reacting halogen must be more reactive than the halide ion in the reacting metal halide)
Write a displacement reaction for:
Salt+ salt —-> salt+ salt
( the metals in 2 salts exchange places)
What is a precipitation reaction
The formation of a solid from a solution during a chemical reaction
Precipitates are often formed when
two aqueous solutions are mixed together
The precipitate is soluble in water
True or False
False
The precipitate is insoluble in water
Do the time trial Challenge sheet on Balancing equations in 15 minutes
should be in chem folder with the rest of the sheets
Do Task 1 in 2.1.4 Acids and Bases Booklet
Page 4
Do Task 5 in 2.1.4 Acids and Bases Booklet
page 7
Make flashcards on Practical: Acids, Bases, Alkalis and Neutralization in Booklet
Should be at the back of the booklet
Scan first QR code on the first page of Acids and Bases Booklet
Watch the MaChemGuy video
Scan the second QR code on the first or front page and follow seneca link
Complete whatever task it asks
Scan the third QR code on Front page and complete quizlet link
Should be straight forward