What pH value is neutral?
7
What is the name of H3O+ ?
Hydronium
T/F: The composition of a substance is always the same
True
T/F: Compounds contain atoms from at least two different elements
True
What factors affect solutbility?
Temperature and pressure
What are the two types of mixtures?
Heterogeneous and homogeneous
What is the equation for concentration?
m/V (mass of solute dissolved/ volume of the solution)
________ is a pure substance composed of only one type of atom.
elements
What testing paper can we use to test if a solution is acidic or basic?
Litmus paper
What is the name of OH- ?
Hydroxide
What type of bond is known as" the sharing of electrons"
Covalent bonds
What methods can make a solid solute dissolve faster in a liquid solvent?
Stir the solution, increase the temperature (melt), and crush the solute
True or false: Mixtures are not chemically combined.
True
What is another name for homogeneous mixture?
solution
T/F: A concentrated solution is a solution with more dissolved solute
True
What are 3 ways we can make a solute more soluble?
Crush it, stir it, or heat it
Which one represents a heterogeneous mixture?
D
What are the two types of substances?
elements and compounds
What do acids taste like?
Sour
What do bases taste like?
Bitter
What is another name of homogeneous mixture?
solution
True or False: Compounds are formed by physically mixing two or more substances.
False
True or False: A cup filled with water and pebbles is a homogeneous mixture.
False
If I have less salt but more water in my cup, what type of solution is that?
Diluted solution
Polar solvents best dissolve in...
polar solutes
_________ is a pure substance formed by two or more different types of elements.
compound