Acids And Bases Flashcards
Name 5 characteristics of acids
Ph level bellow seven, sour, conducts electric, corrosive. Eg. Hydrochloride
Name five characteristics of bases
Soapy and bitter, PH above seven, conduct electricity, corrosive and eg baking soda
Define the term indicator
An indicator is a substance that changes colour to tell if a substance is an acid or a base
What is universal indicator
Universal indicator shows by a colour change the PH level of a substance
What was my hypothesis of my experiment
Coke is an acid washing up liquid gauscan and lemon juice are acids I think. Washer is national natural. I predict that milk is a base
What is my independent variable from my experiment?
The household substance
What is the dependent variable for my experience?
PH level
What is a control variable for my experiment?
Same equipment, e.g. fashion tiles plus litmus paper and universal paper, same volumes same temperatures.
What were the steeps for my titration experiment
- During the titration slowly add the HCI to the NaOHconstantly swirling the flask to make the contents.
- When the indicator changes from yellow to pink, you’ve reached the endpoint i.e. how much acid is needed to neutralise the base.
- Repeat to get an average.
- Without the indicator adding the average titration volume of HCI.
- Poor the conical flask contents into an evaporating dish then use a hot dish evaporating of all the water
Name 3 examples of everyday acids
Lemon juice
Rain water
Vinegar
Name 2 laboratory acids
Hydrochloric acid
Sulfuric acid
Name 3 everyday bases
Toothpaste
Bleach
Indigestion tablets
List 3 laboratory bases
Sodium hydroxide
Calcium carbonate
Limewater
What is the PH scale
In order to compare the strengths of acids and bases, chemists devised a scale called the pH scale. The scale is from 0 to 14.
What is a neutralisation
The answer is they react together and neutralise, or cancel, each other. They react to produce a salt and water.
