Acid, Base & Salt
Is this acid/base/salt? NaOH
base
Balance this equation:
Sr3(PO4)3 + H2SO3 -> H3PO4 + SrSO3
Balance this equation:
Sr3(PO4)3 + 3 H2SO3 -> 2 H3PO4 + 3 SrSO3
This type of reaction has only one reactant
decomposition
Name the 4 factors that affect reaction rate. Give one real life example.
Enzymes are biological catalyst to help digestion.
What is an isotope?
same # protons, different # of neutrons
Name and identify acid/base/salt: Pb(OH)2 and CH3COOH
lead (II) hydroxide (base)
acetic acid (Acid)
Balance this equation:
Al(OH)3 + H2SO4 -> Al2(SO4)3 + H2O
2 Al(OH)3 + 3 H2SO4 -> Al2(SO4)3 + 6 H2O
What is the products of an acid-base neutralization? Provide an example.
water and a salt
E.g: NaOH + HCl -> NaCl (salt) + H2O
a) Food is stored in the fridge to stay fresh longer. Why is this the case?
b) Peptin is an enzyme that break down proteins into smaller peptides and amino acids, during digestion. In what way is peptin affect the reaction rate.
a) cooling = lower temperature = slower movement of particle = slow down reaction rate (reaction in this case is spoilage)
b) enzyme = catalyst = speed up reaction (ie. digestion)
______ is the mechanism of energy transfer in which atoms and molecules give off energy in the form of electromagnetic waves
radiation
Write the formula for dichromic acid? Is this base/salt/acid?
H2Cr2O7, acid
Identify the type of reaction and balance the equation:
C2H4O + O2 -> CO2 + H2O
2 C2H4O + 5 O2 -> 4 CO2 + 4 H2O
Identify the reaction type and predict the product of this reaction (no need to balance):
Mg + HCl ->
acid-metal
H2 + MgCl2
Energy released is ________ reaction
Energy absorbed is ________ reaction.
Give one example for endo and one example for exo reaction, in real life.
exo
endo
Exo: candle burning
Endo: melting ice
the time required for half the mass of the radioactive sample to decay into another element.
What is the pH range of a solution that is blue in bromothymol blue, blue in litmus, colorless in phenolphthalein?
7.5-8.5
Identify the reaction type, predict the product of this reaction and balance the equation:
Na3PO4 + MgCl2 ->
double replacement
Products: Mg3(PO4)2 + NaCl
Balance: 2 Na3PO4 + 3 MgCl2 -> Mg3(PO4)2 + 6 NaCl
Identify the reaction type and determine the reactant:
____________ -> I2 + KBr
Single replacement
Reactants: Br2 + KI
a) The minimum amount of energy required to break the bonds in the reactants.
b) The highest peak on a potential energy vs. reaction graph.
a) activation energy
b) activated complex
What are the 3 types of nuclear decays? Which one release helium nuclei?
alpha, beta, gamma
alpha
What is the different between Na2O and SO2? What would happen if they are added to water?
Na2O is metal oxide -> create base when added to water
SO2 is non-metal oxide -> create acid
Identify the reaction type, predict the product of this reaction and balance the equation:
Na2CO3 + HClO2 ->
acid-carbonate
Na2CO3 + 2 HClO2 -> 2 NaClO2 + H2O + CO2
Identify the reaction type and determine the reactant:
a) ____________ -> H2O
b) ____________ -> Mg2O
Both are synthesis
a) H2 and O2
b) Mg and O2
Calculate the activation energy and the overall potential energy change in this graph. Is this an endo/exo reaction?
endo
Overall potential change = +30 kJ
Activation energy = 80 kJ
What is the difference between nuclear fission and nuclear fusion?
Fission: heavier nucleus is split into smaller, lighter nuclei with the release of energy.
Fusion: two very nuclei combine, or fuse, to form a slightly larger nucleus and energy