Acids and Redox Flashcards
What is the formula for: Sulfuric acid?
H2S04
What is the formula for: Hydrochloric acid?
HCl
What is the formula for: Nitric Acid
HNO3
What is the formula for: Ethanoic acid?
CH3COOH
What are Acids
Acids are proton (H+) donors, they can be strong or weak.
What the difference between strong and weak acids?
Strong acids completely dissociate in solution
weak acids partially dissociate in solution
what does dissociate mean?
split up into its ions
What is a base?
Proton (H+) acceptors
How do we make a standard solution?
- Add some of the substance t a weighing boat and measuring out 2.10g on a balance.
- Add the solid to a beaker
- add a small amount of distilled water and begin to stir with a glass rod, continue to add distilled water and stir until all the substance has dissolved.
- Rinse off the weighing boat and glass rod into the beaker to ensure all the substance has been added.
- Pour the solution into a 250 cm cubed volumetric flask unsung glass funnel, Add the washings of the glass rod and funnel to the volumetric flask.
- Continue to add distilled water until the solution is sitting at the bottom of the meniscus.
- place the stopper in the volumetric flask and invert several times to ensure all the solution has mixed properly.
How can we reduce the percentage uncertainty?
Use Larger quantities
Use more accurate equipment
Whats the rule for all pure elements?
They all have an oxidation number of Zero
Whats the rule for ions?
The Oxidation number is equal to the charge on the atom
Whats the rule for fluorine?
always -1
Whats the rule for Hydrogen
Normally +1 but if bonded to a metal -1
Whats the rule for oxygen?
Is usually -2 but when bonded to a fluorine it has a +2 oxidation number, in peroxides it has a -1 oxidation number
