Subatomic particles
What element has 12 protons? What charge will its ion have?
Magnesium, 2+
Identify the following as ionic or molecular, and name:
KCl
Ionic, potassium chloride
What is the Arrhenius definition of a base?
Produces OH-(aq) ions in solution
What type of reaction is this?
2NaOH(aq) + H2SO4(aq) --> 2H2O(l) + Na2SO4(aq)
Neutralization
What is the molar mass of CH4?
16.05 g/mol
How many protons, neutrons and electrons does Fe2+ have?
p: 26, n: 30, e: 24
Identify the following as ionic or molecular, and name:
Mn3(PO4)2
Ionic, manganese (II) phosphate
Name 3 properties of acids
- conduct electricity
- taste sour
- sticky texture
- pH below 7
Predict the products of this formation reaction and balance!
Mg(s) + O2(g) -->
2Mg(s) + O2(g) --> 2MgO(s)
How many particles are in 1.3 moles of aluminum?
7.83 E 23 particles
What is an isotope?
Atoms with the same number of protons but different numbers of neutrons (ie. different atomic mass)
Identify the following as ionic or molecular, and name:
N2O3
Molecular, dinitrogen trioxide
Name the following:
H3PO4(aq)
HF(aq)
Phosphoric acid
Hydrofluoric acid
What can be used as evidence of a chemical change? Give 3 examples
- energy transfer
- colour change
- precipitate formed
- odour
- gas
- etc
How many moles are in 42.1 grams of water?
2.34 mol H2O
What are valence electrons?
Electrons in the highest energy level of the atom
Name 3 properties of ionic compounds
Ionic: soluble in water, high, melting/boiling points, crystal lattice, conductive in solution...
Write the formula for the following:
Sulfurous acid
Permanganic acid
H2SO3(aq)
HMnO4(aq)
Predict products and balance the following:
C2H6(g) + O2(g) -->
2C2H6(g) + 7O2(g) --> 6H2O(g) + 4CO2(g)
What is the molar mass of zinc hydroxide?
Molar mass Zn(OH)2 = 99.43 g/mol
How many electrons does a chlorine atom have? How many are valence electrons?
17 electrons, 7 valence electrons
What is the difference between an ionic bond and a covalent (molecular) bond?
Ionic: attraction between positive and negative ions resulting in a transfer of one or more valence electrons
Molecular: sharing of valence electrons
Identify each as an acid or a base and name.
CH3COOH (aq)
Ca(OH)2 (aq)
HClO3 (aq)
CH3COOH (aq) - acid, acetic acid
Ca(OH)2 (aq) - base, calcium hydroxide
HClO3 (aq) - acid - chloric acid
Balance and give states for the following:
Na3PO4(aq) + MgCl2(aq) --> NaCl( ) + Mg3(PO4)2 ( )
2Na3PO4(aq) + 3MgCl2(aq)
--> 6NaCl(aq) + Mg3(PO4)2 (s)
How many grams of copper (II) chloride are there in 0.32 moles?
43 grams
molar mass CuCl2 = 134.45 g/mol