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How could you determine the acidity of household items? - Coggle Diagram
How could you determine the acidity of household items?
Household Items
Vinegar
Dish Soap
Borax
Chlorine Bleach
Amonia
Hydrogen Peroxide
Lemon Juice
Shampoo
Vegetable Oil
Milk
Baking soda
Isopropyl Alcohol
Weed killer
Background Infromation
How is acidity measured?
pH scale
pH = -log(H+)
The ph scale ranges from 0 - 14
7 is neutral (water)
0 is most acidic
14 is most basic
Unit: pH
pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.In chemistry, pH, also referred to as acidity, historically denotes "potential of hydrogen".
What is acidity?
Acidity is the tendency of a compound to act as an H+ don
Tests to measure acidity.
Titration
Accurate and reliable results, but long process to set up, very likely to make mistakes that will significantly change results
pH strip
quick results and easy to do, but though reliable, innacurate results
Electrodes and a millivoltmeter (pH meter)
Very accurate and reliable reults, but very expensive.
Limiations
Certain chemicals can release gases that can harm the human bodty, such reaction should not be done
Mosture in the lab cannot be controlled especially since multiple other experiments will be conducted at the same time. Other experiments may use heating equipment such as bunsun burners which will release heat into the lab. This will also change not only the mosture but also the temperature in the room.
Risk Assesment
Glass Equpiment should be handeled with care as they are fragile and if broken, can injure you very easily
Certain chemicals can be harmful if consumed, inhaled or exposed to skin, eyes or other parts of body.
Heating objects such as bunsen burners should be used with the correct equipment and should be monitored at all times
Parameters
Temperature
temperature may change how acidic or bacic a solution is
Concentration
Different levels of concentrations may impact the pH level of solutions.
The pH scale measures the concentration of H+ ions, having varous concentrations of the same substance may result in inconsisten results.
Purity
Concentration of CO2 will effect the pH of a solution
Higher concentrations of CO2 in a solution will increase the change that it bonds with H2O and create carbonic acid which will effect the pH
Other perticals might interfere with
Pressure