| Chem help!!!! | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Chem help!!!! Sat Oct 30, 2010 11:05 am | |
| 1. How would you synthesise chromyl chloride (CrO2Cl2)? What precautions might you take? Is it likely to be a liquid or a solid at ordinary temperatures, and what is its likely colour?
2.CaF2 has a Ksp = 3.8*10^-11 at 25°C. What is the [F-] in a saturated solution of CaF2 at 25°C?
3.E° = 0.93 V for the reaction Fe(s) + 2M+(aq) >> Fe2+(aq) + 2M(s). The standard reduction potential is -0.41 V for the reaction Fe2+(aq) + 2M(s) >> Fe(s). What is the standard potential for M+ + e- >> M?
4. CuCNS+KIO3+HCl --> HCN+CuSO4+ICl+H2O+KCl . Balance this equation
there 16 more questions but i got them. i dont understand these four. I hate my science teacher. Help me. Thank you. 8th grade sucks. | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: Chem help!!!! Sat Oct 30, 2010 11:18 am | |
| 1.Don't know. Solid. Look it up. 2. How the hell are you expected to solve this question in 8th grade chem?! I took it in Ap chem. Anyways I need to refresh my memory Ill tell you later. 3. 1.34V 4. This is easy. You balance it. | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Sat Oct 30, 2010 11:47 am | |
| balance it then. i keep getting it wrong. and thnx for #3. i cant find answers to #1. waiting for #2 if u can help. | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: Chem help!!!! Sat Oct 30, 2010 2:28 pm | |
| the 2nd and 3r questions are AP level questions ... | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Sun Oct 31, 2010 12:03 pm | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: Chem help!!!! Sun Oct 31, 2010 12:36 pm | |
| Sorry Im a bit busy...isn't this HW? | |
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Justice NH Member
Number of posts : 741 Username Change Points : 6401 Reputation : 5 Registration date : 2010-04-29 Mood : Country :
| Subject: Re: Chem help!!!! Sun Oct 31, 2010 4:10 pm | |
| Number 2 Make a chart and i think its gona be like x and 2x so you will get 2x^2=3.8*10^-11 or something like that. I forgot how to do these KSP. plus are you sure your 8th greade teahcer gave you this? | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: Chem help!!!! Sun Oct 31, 2010 4:12 pm | |
| ask ur 8th grade teacher why the hell is s/he giving you college chem questions | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 9:58 am | |
| he said this is not college chem and that we are gonna learn it this year or next year. | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 9:59 am | |
| nobody in my class answered those four questions but the other question were also freikin hard but i used the text book. | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 6:02 pm | |
| - Redwan wrote:
- he said this is not college chem and that we are gonna learn it this year or next year.
lol tell him hes retarded KSP and solubility is from chem 2 | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:09 pm | |
| i am gonna tell him, "my frnds on the internet think ur retarded." | |
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Fangy NH Retired Moderator
Number of posts : 8314 Username Change Points : 14227 Reputation : 71 Registration date : 2009-03-23 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:12 pm | |
| Dude, this is AP Chem stuff. There's a problem if he's teaching you this. I asked a friend in Honors Chem and she didn't know at all. The balancing part is easy though, but that's all I would know. | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:25 pm | |
| yeah i am gonna tell my teacher tmrw. | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:30 pm | |
| if you asked me exaclty a year ago i would know | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:30 pm | |
| Lol your teacher is teaching you the wrong stuff and you'll fail the basic regents chem questions. At least you'll be ready for AP Chem lol | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:31 pm | |
| wait i am good with normal chem. so i am gud for chem regents | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:32 pm | |
| Really? But you just started the year... | |
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Redwan NH Member
Number of posts : 702 Username Change Points : 6149 Reputation : 1 Registration date : 2010-08-28 Mood : Country :
| Subject: Re: Chem help!!!! Tue Nov 02, 2010 10:34 pm | |
| i know but i am pretty good at it. i looked thru the book and i can do a lot. but i need to memorize a lil things. tahts all | |
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| Chem help!!!! | |
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