Number of results: 101,328
Could someone write out the total ionic equation and the net ionic equation for: 2Na3PO4 (aq) + 3CuSO4 • 5H2O (aq) → Cu3 (PO4)2 (s) + 3Na3SO4 (aq) + 15H2O (l) Cu++ + PO4--- >>> Cu3 (PO4)2 (s) Of course, it needs to be balanced.
Sunday, November 26, 2006 at 8:16pm by Kaylee
I have to match the items to the statements below, and I'm stuck! My answers are in parentheses, but I know that some of them are wrong. Please help if you know how...I would GREATLY appreciate it! A Dilute B Unsaturated C Saturated D Supersaturated 1. Sodium acetate solution ...
Tuesday, April 24, 2007 at 8:17pm by Lindsay
Using the tables of enthalpies of formation and entropies of formation, estimate the boiling point for the following liquid: methanol (CH3OH), ethanol (C2H5OH) and acetic acid (CH3COOH). compare to their tabled boiling points. how would i go about working this question? table ...
Sunday, October 7, 2007 at 5:48pm by John
Give the full set of quantum numbers for the electron lost when a Cs atom ionizes. a. n = 6; l = 1; ml = –1; ms = +½ b. n = 5; l = 0; ml = +1; ms = –½ c. n = 5; l = 0; ml = 0; ms = –½ d. n = 6; l = 0; ml = 0; ms = +½ Is the answer A.
Friday, November 9, 2007 at 6:49pm by Sam
The electron LOST is a free electron. leaving a Cs+ ion with a filled-shell Xenon configuration behind. n = 5 and l=0 ( a 1S spectroscopic state) The ground state for the Cs+ ion (not the electron) would be n = 5; l = 0; ml = 0 BUT there would be no net electron spin, and 0 ms...
Friday, November 9, 2007 at 6:49pm by drwls
URGENT help! 3. A rock sample was dated using potassium-40, Neasyrenebt ubducated tgat 1/8 of the original parent isotope is left in the rock sample. How old is the rock? 5. When a sample of lava solidfied, it contained 28g of uranium-238. It that lava sample was later found ...
Friday, March 5, 2010 at 4:49am by Anon
Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated solution ...
Monday, April 12, 2010 at 9:35pm by Maggie
HNO3 + KOH ==> KNO3 + H2O moles HNO3 = 2000 x 1 x 10^-3 = 2 mmoles. moles KOH = 2ooo x 1 x 10^-2 = 20 mmoles. Why subtract. This is an acid/base reaction, they neutralize each other. ALL of the HNO3 is GONE and you are left with an excess of 20-2 =18 mmoles KOH. So (OH...
Sunday, May 2, 2010 at 11:59pm by DrBob222
Chemistry - repost
Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks Posted by candy on Tuesday, September 21, 2010 at 10:03am. The following is part of a procedure for a limit ...
Tuesday, September 21, 2010 at 3:12pm by candy
Chemistry - bobpursley pls help
Posted by candy on Tuesday, September 21, 2010 at 3:12pm. Yes, my NaOH is granular. Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks Posted by candy on ...
Tuesday, September 21, 2010 at 4:47pm by candy
Chemistry - urgent help needed
The following is part of a procedure for a limit test for sulphates in an NaOH sample:- Dissolve 3.0g of NaOH in 6ml of deionized water, adjust to pH 7 with 12M HCl (about 6.2ml) and dilute to 15ml with deionized water. When about 6ml of 12M HCl was added, a white ppt was ...
Wednesday, September 22, 2010 at 6:03pm by candy
hydrogen gas is collected in a bottle, and the pressure of the gas is 892 torr at 24 °C. what is the pressure of hydrogen gas when the temperature decreases to 20 °C? chemistry - DrBob222, Tuesday, November 30, 2010 at 1:25pm (P1/T1) = (P2/T2) Dear Dr Bob: is this a right ...
Tuesday, November 30, 2010 at 3:30pm by Lynn
This is a stoichiometry problem. Here is a solved example of a stoichiometry problem. Just follow the steps. http://www.jiskha.com/science/chemistry/stoichiometry.html After you have moles H2, use PV = nRT to convert moles to volume.
Tuesday, November 30, 2010 at 4:17pm by DrBob222
if 100 g of iron were reacted with 100 g of oxygen according to the reaction below, the maximum yield in grams of Fe2O3 would be: chemistry urgent - bobpursley, Tuesday, November 30, 2010 at 4:20pm Balance the equation. Note the coefficents on Fe and O2, that is the mole ...
Tuesday, November 30, 2010 at 4:33pm by lynn
Here is a worked example of a stoichiometry problem. Just follow the steps. At the end, the grams you obtain will be the theoretical yield. Then %yield = (actual yield/theoretical yield)*100, substitute and solve for actual yield. http://www.jiskha.com/science/chemistry/...
Thursday, December 16, 2010 at 11:36am by DrBob222
If you take many more chemistry courses you will NOT be able to get away with using lower case for formulas. mgCo3 actually means milligrams carbon + o3 means nothing. To solve the problem, first write the equations and balance them. Al(OH)3 + 3H^+ ==> Al^+3 + 3H2O Mg(OH)2...
Monday, March 7, 2011 at 10:17am by DrBob222
1 is a stoichiometry problem; I expect you've worked many of those. Here is a worked example to show how you convert moles Na2C2O4 (moles = M x L) to moles La2(C2O4)3. http://www.jiskha.com/science/chemistry/stoichiometry.html For #2, note that millimoles LaCl3 = M x mL = 25 x...
Thursday, December 15, 2011 at 11:45pm by DrBob222
Chemistry(Please help, thank you)
I have to calculate the concentration of I2 produced (# of moles of I2 produced / L) based on the stoichiometric ratio in the following equation. 2S2O3^2- + I2 -> 2I^- + S4O6^2- Chemistry(Urgent, please help) - DrBob222, Sunday, February 26, 2012 at 9:47pm If you know the ...
Monday, February 27, 2012 at 11:10pm by Hannah
Here are the equations and some explanation. CH4 + 2O2 ==> CO2 + H2O 2C2H6 + 7O2 ==> 4CO2 + 6H2O -------------------------- The first equation is x + y = 30 Here is how you get the second equation. x cc CH4 gives x cc CO2 x cc CH4 USES 2x O2. y cc C2H6 gives 2y cc CO2 y ...
Monday, October 29, 2012 at 10:48pm by DrBob222
Does anyone have a "Chemistry in Context 6th edition" by mcgraw and hill book? I don't have one and my homework is in there. Page 30, questions 5,6 & 7. If you could, type out the questions for me that would be a HUGE help.
Friday, October 25, 2013 at 1:44am by michelle