Welcome Guest Search | Active Topics |

 AAMC Practice Test FLE 1 Previous Topic Next Topic
 Keira_6444 #1 Posted : Wednesday, July 14, 2021 1:31:03 AM Rank: NewbieGroups: Registered Joined: 4/14/2021Posts: 7Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) Passage 10 #54: Are you able to explain why C is the answer? The explanation only says its right because it is balanced but to me, they all look balanced. Also, how are we supposed to determine whether the Al (s) or the Cu (s) is on the reactant side vs the product side of the equation?Thanks! Back to top User Profile
 INSTR_Katrina_128 #2 Posted : Friday, July 16, 2021 9:58:14 PM Rank: Advanced MemberGroups: Registered Joined: 5/18/2021Posts: 73Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) Hi Keira!Great question. The explanation doesn't provide very much detail, unfortunately. ðŸ˜¥Take a look at B and D, first. Focus on the charges. In B, there are 3(3+) on left and 2(2+) on the right. The charges aren't balanced! Similarly, for D, there are 2(2+) on the left and 3(3+) on the right. The charges also aren't balanced! So, B and D cannot be correct!For A and C, both have 2(3+) or 3(2+) on the left and right, indicating a balnace of charges. So which one is correct?Take a look at the table. In the first row and second column, the table tells us that a mixture of Al3+(aq) and Cu(s) gives NO CHANGE. This means that Al3+(aq) DON'T REACT. Took a look at reaction A. If Al3+(aq) and Cu(s) don't react, then how can reaction A proceed? ðŸ˜®By process of elimination, only C remains. Click and you're done!You can confirm that it must be true (if you really want to), by seeing that Cu2+(aq) and Al(s) produces a new solid (second row, first column of the table).Let me know if that helps. ðŸ˜€ Back to top User Profile
 Keira_6444 #3 Posted : Saturday, July 17, 2021 8:25:44 PM Rank: NewbieGroups: Registered Joined: 4/14/2021Posts: 7Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) yes that is very helpful thank you! Back to top User Profile
 INSTR_Calla_139 #4 Posted : Thursday, July 29, 2021 9:18:10 PM Rank: MemberGroups: Registered Joined: 6/8/2021Posts: 13Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) Good Luck with everything:) Back to top User Profile
 Users browsing this topic Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)