Monday, July 15, 2013
Blog of the Day
Lithium (Li) is a akaline metal with an atomic weight of 6.941 and an atomic number of 3. It is highly reactive, conducts electricity, and is malleable. It is used in batteries, for metal illnesses like bipolar disorders and for blood disorder like anemia.
2SCS pg.180-181 #1-12
1) The law of conversations of mater is that matter is neither created nor destroyed.
2) Scientific law summarizes what has been learned by careful observation of nature.
3) Expressions such as "using up" and "throwing away" are misleading because the law of coversation of matter states that matter is neither created nor destroyed and "using up" and "throwing away" seem like the atoms are dissapearing when they are actually just being rearranged into a different molecule.
4)
a. Not balanced
Sn-1 Sn-1
H-1 H-2
F-1 F-2
b. Not balanced
Si-1 Si-1
O-2 O-1
C-1 C-2
c. Balanced
Al-1 Al-1
O-3 O-3
H-6 H-6
Cl-3 Cl-3
5)
a. The coefficient for hydrogen gas is 3.
b. The coefficient for NH3 gas is 2.
c. The coefficient for nitrogen gas is 1.
6)
a. 1, 3, 1, 3
b. 2, 3, 2, 2
c. 4, 2, 3
7)
a. 1, 3, 2, 3
b. 2, 25, 16, 18
8)
a.
Na-2 Na-2
S-1 S-1
O-4 O-4
K-2 K2
Cl-1 Cl-1
b. No, because the student added/changed the subscripts and subscripts are supposed to stay the same.
c. 1, 2, 2, 1
9) It would take 19,000,000 years.
10)
a. 32 g
b. 48 g
c. 100 g
d. 58 g
e. 180 g
11) 63.6 g copper metal and 23.0 g of sodium metal both correctly represent 1.00 mol.
12)
a. 1 atom.
b. .5 atoms.
c. .1 atoms.
d. .03 atoms.
2) Scientific law summarizes what has been learned by careful observation of nature.
3) Expressions such as "using up" and "throwing away" are misleading because the law of coversation of matter states that matter is neither created nor destroyed and "using up" and "throwing away" seem like the atoms are dissapearing when they are actually just being rearranged into a different molecule.
4)
a. Not balanced
Sn-1 Sn-1
H-1 H-2
F-1 F-2
b. Not balanced
Si-1 Si-1
O-2 O-1
C-1 C-2
c. Balanced
Al-1 Al-1
O-3 O-3
H-6 H-6
Cl-3 Cl-3
5)
a. The coefficient for hydrogen gas is 3.
b. The coefficient for NH3 gas is 2.
c. The coefficient for nitrogen gas is 1.
6)
a. 1, 3, 1, 3
b. 2, 3, 2, 2
c. 4, 2, 3
7)
a. 1, 3, 2, 3
b. 2, 25, 16, 18
8)
a.
Na-2 Na-2
S-1 S-1
O-4 O-4
K-2 K2
Cl-1 Cl-1
b. No, because the student added/changed the subscripts and subscripts are supposed to stay the same.
c. 1, 2, 2, 1
9) It would take 19,000,000 years.
10)
a. 32 g
b. 48 g
c. 100 g
d. 58 g
e. 180 g
11) 63.6 g copper metal and 23.0 g of sodium metal both correctly represent 1.00 mol.
12)
a. 1 atom.
b. .5 atoms.
c. .1 atoms.
d. .03 atoms.
Sunday, July 14, 2013
2SBS pg.151-152 #9-22
9) Active metals are more difficult to process and refine than less reactive metals because active metals combine with other elements, while less reactive metals tend to stay separate from other elements.
10) Silver would be the easiest to process because it is unreactive.
11) Most metals exist in nature are minerals rather than as pure metallic elements because they are mostly reactive metals which causes them to combine with other elements, forming compounds or minerals.
12) Reaction A is more likely to occur because calcium is more reative than chromium.
13) Reaction B since zinc is more reactive than silver.
14) It would be a poor idea to stir a solution of lead nitrate with an iron spoon because iron is more reactive than lead and they would most likely cause a reaction.
15) Reduction is the gain of one or more electrons and oxidation is the lose of one or more electrons.
16)
a. Au3+ + 3e- ---> Au
b. V ---> V4+ + 4e-
c. Cu+ ---> Cu2+ + 2e-
17)
a. reduction reaction.
b. oxidation reaction.
c. reduction reaction.
18)
a. Zn has been oxidized since it loses 2 electrons.
b. Ni has been reduced since it has gained 2 electrons.
c. The reducing agent is Zn.
19)
a. K+ has been oxidized since has lost an electron.
b. Hg has been reduced since it has gained 2 electrons.
c. The oxidizing agent is Hg2+.
20)
a. Al + Cr3+ ---> Al3 + C
b. Mn2+ + Mg ---> Mn + Mg
21)
a. Electrometallurgy uses an electrical current to supply electrons to metals ions.
b. Pyrometallurgy uses heat to convert metal cations to atoms.
c. Hydrometallurgy uses reactants in a water solution to treat ores and other metal-containing materials.
22)
a. Electrometallurgy
b. Pyrometallurgy
10) Silver would be the easiest to process because it is unreactive.
11) Most metals exist in nature are minerals rather than as pure metallic elements because they are mostly reactive metals which causes them to combine with other elements, forming compounds or minerals.
12) Reaction A is more likely to occur because calcium is more reative than chromium.
13) Reaction B since zinc is more reactive than silver.
14) It would be a poor idea to stir a solution of lead nitrate with an iron spoon because iron is more reactive than lead and they would most likely cause a reaction.
15) Reduction is the gain of one or more electrons and oxidation is the lose of one or more electrons.
16)
a. Au3+ + 3e- ---> Au
b. V ---> V4+ + 4e-
c. Cu+ ---> Cu2+ + 2e-
17)
a. reduction reaction.
b. oxidation reaction.
c. reduction reaction.
18)
a. Zn has been oxidized since it loses 2 electrons.
b. Ni has been reduced since it has gained 2 electrons.
c. The reducing agent is Zn.
19)
a. K+ has been oxidized since has lost an electron.
b. Hg has been reduced since it has gained 2 electrons.
c. The oxidizing agent is Hg2+.
20)
a. Al + Cr3+ ---> Al3 + C
b. Mn2+ + Mg ---> Mn + Mg
21)
a. Electrometallurgy uses an electrical current to supply electrons to metals ions.
b. Pyrometallurgy uses heat to convert metal cations to atoms.
c. Hydrometallurgy uses reactants in a water solution to treat ores and other metal-containing materials.
22)
a. Electrometallurgy
b. Pyrometallurgy
It's no myth, just call us Lith: Converting Copper Lab
Makena G.
Nina G.
Nicolette E
Dr. Forman
Chemistry
1)
a. As we heated the copper we noticed the coppper became darker, and it formed a solid which was easily breakable.
b. Yes, the copper atoms did remain crucible because we were very careful when moving the crucible form the hot plate to the table with our tongs.
2)
a. The changes we observed were chemical changes.
b. The observational evidence that led us to that conclusion was that it turned into a solid due to the fact that the oxygen formed into a solid as the result of combining with the copper.
Started amount of copper: 18.30 g
Ending amount of copper: 18.31 g
RESULT: Copper oxide weighs a bit more than copper itself.
Nina G.
Nicolette E
Dr. Forman
Chemistry
1)
a. As we heated the copper we noticed the coppper became darker, and it formed a solid which was easily breakable.
b. Yes, the copper atoms did remain crucible because we were very careful when moving the crucible form the hot plate to the table with our tongs.
2)
a. The changes we observed were chemical changes.
b. The observational evidence that led us to that conclusion was that it turned into a solid due to the fact that the oxygen formed into a solid as the result of combining with the copper.
Started amount of copper: 18.30 g
Ending amount of copper: 18.31 g
RESULT: Copper oxide weighs a bit more than copper itself.
Wednesday, July 10, 2013
2SBS pg.180 #1-8
1)
Atmosphere: oxygen and nitrogen
Hydrosphere: water and dissolved minerals
Lithosphere: petroleum and metal-bearing ores
2)
a.
Crust: 40 km thick, contains major raw materials
Mantle: 40-2900 km thick, contains silivates of Mg and Fe and is the middle layer of the lithosphere
Core: 2900 km thick, contains Fe and Ni, center of the earth
b. The crust serves as the main storehouse of chemical resources used in manufacturing consumer products.
3)
a. Mexico
b. Japan
c. China
4) China produces the larges masses of the eight listed resources in the table.
5) Ores and minerals differ because ores are naturally occuring rocks or minerals that can be mined and from which are profitible to extract and minerals are naturally occuring solid compounds containing the element or gorup of elements of interest.
6)
-The quantity of useful ore found at the site
-The percent of metal in the ore
-The type of mining and processing needed to extract the metal from its ore
-The distance between the mine and metal-refining facilities and markets
-The metal's supply-versus-demand status
-The environmental impact of the mining and metal processing
Atmosphere: oxygen and nitrogen
Hydrosphere: water and dissolved minerals
Lithosphere: petroleum and metal-bearing ores
2)
a.
Crust: 40 km thick, contains major raw materials
Mantle: 40-2900 km thick, contains silivates of Mg and Fe and is the middle layer of the lithosphere
Core: 2900 km thick, contains Fe and Ni, center of the earth
b. The crust serves as the main storehouse of chemical resources used in manufacturing consumer products.
3)
a. Mexico
b. Japan
c. China
4) China produces the larges masses of the eight listed resources in the table.
5) Ores and minerals differ because ores are naturally occuring rocks or minerals that can be mined and from which are profitible to extract and minerals are naturally occuring solid compounds containing the element or gorup of elements of interest.
6)
-The quantity of useful ore found at the site
-The percent of metal in the ore
-The type of mining and processing needed to extract the metal from its ore
-The distance between the mine and metal-refining facilities and markets
-The metal's supply-versus-demand status
-The environmental impact of the mining and metal processing
7) It could have reopened again because there may be now enough gold for people to start mining again due to the fact it has been inactive for 100 years.
8) "Useful ore" refers to the ore that can used.
Tuesday, July 9, 2013
Blog of the Day
In the periodic table understand how many protons, nuetrons, and electrons each element has and that horizontal columns are called periods and vertical columns are called groups/families. I also understand that on the righmost column is unreactive and the leftmost column is very reactive. I also understand that it is organized by increasing atomic numbers and weights.
2SAS pg. 131 #13-25
13)
a. Periods
b. Groups or Families
14)
1. Sodium (Na)
2. Potassium (K)
15)
a. The noble gases are located in the rightmost column
b. All nobles gases are unreactive
c. They all have low melting and boiling points
16)
a. MgF₂
b. GaP
w 17)
98+39=137
137/2=68.568.5°C
18) I would expect Chlorine's boiling point to be lower than Iodine's because Iodine has a larger atomic weight.
19)
a. Carbon
b. Nitrogen
c. 20
d. 20
e. Platinum
f. 78
g. 92
h. 92
20)
a. 4 protons, 4 electron, 5 nuetrons
b. 7 protons, 7 electrons, 7 nuetrons
c. 10 protons, 10 electrons, 10 nuetrons
21) The correction is that Pb has lost 2 electrons.
22)
a.
Carbon: 12
Nitrogen: 14
Calcium: 40
Platinum: 195
Uranium: 238
b. Carbon
23) No there is not enough information since we don't the atomic weight or atomic numbe.
24) The mass of an electron is 1/2000 of a proton or nuetron.
25)
24: 12, 12
25: 12, 13
26: 12, 14
a. Periods
b. Groups or Families
14)
1. Sodium (Na)
2. Potassium (K)
15)
a. The noble gases are located in the rightmost column
b. All nobles gases are unreactive
c. They all have low melting and boiling points
16)
a. MgF₂
b. GaP
w 17)
98+39=137
137/2=68.568.5°C
18) I would expect Chlorine's boiling point to be lower than Iodine's because Iodine has a larger atomic weight.
19)
a. Carbon
b. Nitrogen
c. 20
d. 20
e. Platinum
f. 78
g. 92
h. 92
20)
a. 4 protons, 4 electron, 5 nuetrons
b. 7 protons, 7 electrons, 7 nuetrons
c. 10 protons, 10 electrons, 10 nuetrons
21) The correction is that Pb has lost 2 electrons.
22)
a.
Carbon: 12
Nitrogen: 14
Calcium: 40
Platinum: 195
Uranium: 238
b. Carbon
23) No there is not enough information since we don't the atomic weight or atomic numbe.
24) The mass of an electron is 1/2000 of a proton or nuetron.
25)
24: 12, 12
25: 12, 13
26: 12, 14
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