CHEM134 C002 DIGITAL TITRATION OF ACIDS
AND BASES STUDY GUIDE WITH SOLVED
QUESTIONS AND ANSWERS
◉ Rules for determining sig figs.
Answer:
◉ Density = ?.
Answer: mass / volume
◉ Conservation of Mass and Energy.
Answer: A physical law stating that the total amount of mass and
energy remains constant before/after/during a reaction
◉ Law of Multiple Proportions.
Answer: if two or more different compounds are composed of the
same two elements, then the ratio of the masses of the second
element combined with a certain mass of the first element is always
a ratio of small whole numbers
◉ What evidence about atomic structure was revealed by the
experiments of Thomson.
,Answer: using cathode tubes to determine the existence of electrons
◉ What evidence about atomic structure was revealed by the
experiments of Millikan.
Answer: oil drop experiments accurately measure the value of this
elementary charge, approximately 1.602×10-191.602e-19
◉ What evidence about atomic structure was revealed by the
experiments of Rutherford.
Answer: evidence that the atom consists mostly of space with a tiny,
dense, positively charged nucleus at its center
◉ How to determine the number of protons, neutrons, and electrons
from the symbol on the periodic table.
Answer:
◉ How to find the average atomic mass.
Answer: To calculate the average atomic mass of an element:
* Multiply the mass of each isotope by its natural abundance
(expressed as a decimal).
* Sum the results from all isotopes.
◉ What is the value of Avagadro's Number and what does it do?.
,Answer: 6.022e23
used to convert from mass to moles
◉ Differentiate between ionic and molecular compounds..
Answer: * Ionic compounds are formed by the transfer of electrons
between a metal and a nonmetal, creating a lattice of charged ions
* molecular compounds are formed by the sharing of electrons
between nonmetals, resulting in discrete, neutral molecules
◉ What are the four types of chemical formulas?.
Answer: empirical, molecular, structural, and condensed structural
◉ Ionic vs Molecular Compounds.
Answer: Ionic compouds = metal + nonmetal (trans e-)
Molecular compounds = nonmental + nonmetal (share e-)
◉ Nitrate.
Answer: N03-
◉ Nitrite.
Answer: N02-
, ◉ Carbonate.
Answer: C0^2-_3
◉ Bicarbonate.
Answer: HC03-
◉ Sulfate.
Answer: S0^2-_4
◉ Sulfite.
Answer: S0^2-_3
◉ Phosphate.
Answer: P0^3-_4
◉ Hydrogen Phosphate.
Answer: HPO^2-_4
◉ Dihydrogen Phosphate.
Answer: H2PO4-
◉ Hydroxide.
AND BASES STUDY GUIDE WITH SOLVED
QUESTIONS AND ANSWERS
◉ Rules for determining sig figs.
Answer:
◉ Density = ?.
Answer: mass / volume
◉ Conservation of Mass and Energy.
Answer: A physical law stating that the total amount of mass and
energy remains constant before/after/during a reaction
◉ Law of Multiple Proportions.
Answer: if two or more different compounds are composed of the
same two elements, then the ratio of the masses of the second
element combined with a certain mass of the first element is always
a ratio of small whole numbers
◉ What evidence about atomic structure was revealed by the
experiments of Thomson.
,Answer: using cathode tubes to determine the existence of electrons
◉ What evidence about atomic structure was revealed by the
experiments of Millikan.
Answer: oil drop experiments accurately measure the value of this
elementary charge, approximately 1.602×10-191.602e-19
◉ What evidence about atomic structure was revealed by the
experiments of Rutherford.
Answer: evidence that the atom consists mostly of space with a tiny,
dense, positively charged nucleus at its center
◉ How to determine the number of protons, neutrons, and electrons
from the symbol on the periodic table.
Answer:
◉ How to find the average atomic mass.
Answer: To calculate the average atomic mass of an element:
* Multiply the mass of each isotope by its natural abundance
(expressed as a decimal).
* Sum the results from all isotopes.
◉ What is the value of Avagadro's Number and what does it do?.
,Answer: 6.022e23
used to convert from mass to moles
◉ Differentiate between ionic and molecular compounds..
Answer: * Ionic compounds are formed by the transfer of electrons
between a metal and a nonmetal, creating a lattice of charged ions
* molecular compounds are formed by the sharing of electrons
between nonmetals, resulting in discrete, neutral molecules
◉ What are the four types of chemical formulas?.
Answer: empirical, molecular, structural, and condensed structural
◉ Ionic vs Molecular Compounds.
Answer: Ionic compouds = metal + nonmetal (trans e-)
Molecular compounds = nonmental + nonmetal (share e-)
◉ Nitrate.
Answer: N03-
◉ Nitrite.
Answer: N02-
, ◉ Carbonate.
Answer: C0^2-_3
◉ Bicarbonate.
Answer: HC03-
◉ Sulfate.
Answer: S0^2-_4
◉ Sulfite.
Answer: S0^2-_3
◉ Phosphate.
Answer: P0^3-_4
◉ Hydrogen Phosphate.
Answer: HPO^2-_4
◉ Dihydrogen Phosphate.
Answer: H2PO4-
◉ Hydroxide.
