Lab Quiz 1 (Chemistry) Flashcards
Ionic bond
Ions that have unlike charges and form a bond
Ions
Atom that has lost or gained electrons
Covalent bond
Electrons are shared between atoms
Acid
Molecule that release hydrogen ions( hydrogen atom that is positively charged-lost an electron)
Base
Remove hydrogen ions from different solutions
pH scale
Measure of number of hydrogen ions present in a solution
Neutral solutions
Have an equal number of hydrogen ions and hydroxide ions
What color does bromthymol blue change when mixed with an acid
Yellow
What color is bromthymol blue in a base
Blue
What color would you expect bromthymol blue to be if it is in a neutral soloution
Yellow
What color does phenolphthalein change to in a base
Hot pink
Which is an indicator of acid
- bromthymol blue
- phenolphthalein
Bromthymol blue
When does a chemical reaction happen
Two atoms or molecules react with one another
Physical evidence that a reaction has taken place
Bubbling
Color change
Production of heat
NaCl+AgNO3= NaNO3+ AgCl
Sodium chloride +silver nitrate= sodium nitrate+silver chloride
Pb(NO3)2 + KI= PbI2+ KNO3
Potassium iodide + lead nitrate = lead iodide + potassium nitrate
Acid + base equals
Salt + water
What happens to sodium bicarbonate mixed with hydrochloic acid
Bubble
What happens to sodium chloride mixed with silver nitrate
It becomes an opaque white
What happens to potassium iodide mixed with lead nitrate
Becomes yellow
