CHEM TEST STUDYYY Flashcards
Nonpolar Covalent
Electrons shared EQUALLY, same EN (equal pull for electrons)
Polar Covalent
Electrons shared UNEQUALLY, diff. EN (pull for electrons uneven)
higher electronegativity because..
more protons in nucleus
Why would two atoms with same EN form a nonpolar covalent bond?
Because they are equal
water is the universal
solvent
Why is water polarity important?
To help dissolve things, creates a slightly positive charge on hydrogen and a slightly negative charge on oxygen, contributing to water’s properties of attraction.
polar molecule
uneven
nonpolar molecule
even
pH of 1-6
acid
pH of 7
neutral
pH 8-14
base
If the pH of a solution is increased from pH 5 to pH 7, it means that the
100 times less than what it was at pH 5
A buffer released H+ when solutions get more __________
basic
A buffer absorbs H+ when the solution gets more
acidic
hydroliphic
polar covalent compounds
hydrophobic
nonpolar covalent compounds
london dispersion forces
a temporary attraction in nonpolar molecules due to the dipoles in said molecule
dipole-dipole forces
occurs between the positive end of one polar molecule and the negative end of a polar molecule
o-h bonds
when a hydrogen atom is bonded to either oxygen, nitrogen, or flourine
ionic
BETWEEN A METAL AND NONMETAL atoms attract opposite charges and the positive ion tends to lose its electrons to a nonmental negative charge
covalent
atoms fight over electrons, as a result, the atoms get pulled together (BOND)
