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