acid base review 2013
TRANSCRIPT
Acid Base Review
What is the pH scale?
• A numerical scale 0-14 that is used to measure how acidic or alkaline a substance is.
What is phenopthalein?
A base indicator. It turns bright pink when put into a base.+
What is bromythymol blue?
• An acid indicator. It turns yellow when placed in an acid.
What is Universal Indicator and how can you use it to test an unknown solution?
• An acid/base indicator. It turns different colors depending upon the strength of the acid and base. You use a color chart to find the number that corresponds to the pH scale.
How does the pH number of a strong acid compare to the pH of a weak acid?
• A strong acid will have a pH of 0-1.
• A strong base will have a pH of 13-14
What is the difference between an acid and a base?
• An acid has a H ion.
• A base has a hydroxide ion.
What sort of foods are acids?
• lemons, oranges, anything with citric acid. Also milk is slightly acidic.
What sort of liquids are cleaners?
• Bases
What do acids taste like?
• sour
What liquid is neutral?
• pure water
How can you compare strengths of acids using the pH scale?
• For every number difference on the pH scale, it is that many power of ten times more acidic.
• Hard to explain…….. For instance….. If you’re comparing something with a pH of 2 to something with a pH of 6…. the pH of 2 is ten thousand times more acidic than the pH of six.
• 6-2=4……….. that means it’s 10 to the fourth power stronger. Ten to the fourth is 10,000
What is the pH range of normal rain?
• 5.6-6.5
What is the pH range of acid rain?
• Below 5.6
What acid does carbon dioxide form in water?
• Carbonic Acid
What is meant by the term "neutralization"?
• Adding base to an acid until it becomes pH close to 7