Number of results: 37,927
Chemistry (Aqueous Solutions)
This one stumped me alot... Aqueous solutions of a compound did not form precipitates with Cl-, Br-, I-, SO4 2-, CO3 2-, PO4 3-, OH-, or S 2-. This highly water-soluble compound produced the foul-smelling gas H2S when the solution was acidified. This compund is __?__. a. Pb(...
Monday, April 5, 2010 at 2:59pm by Macey
chemistry
did i do this correctly? Instructions: For the following reactions, identify the precipitate and write its balancet net ionic equation: H2SO4+BaCl2->HCl+BaSO4 answer: 2SO4+Ba->Ba(SO4)2
Wednesday, January 9, 2008 at 7:56pm by jasmine
chemistry
Which of the following are redox reactions? (a) Ba(NO3)2 (aq) + H2SO4 (aq) -> BaSO4 (s) + 2 HNO3 (aq) (b) NH4NO2 (s) -> N2 (g) + 2 H2O (g) (c) CuO (s) + H2 (g) -> Cu (s) + H2O (L)
Wednesday, May 9, 2012 at 9:54pm by Derrick
Solution Stoichiometry
If 75.0 mL of an AgNO3 solution reacts with enough Cu to produce .25g Ag by single displacement, what is the molarity of the initial AgNO3 solution if Cu(NO3)2 is the other product?
Sunday, March 29, 2009 at 5:10pm by Anonymous
chemistry
You're supposed to use your knowledge of chemistry to answer these. The first one, AgNO3 and Zn(NO3)2. Add NaCl. The AgNO3 reacts with NaCl to produce a white insoluble precipitate of AgCl. Zn(NO3)2 and NaCl does nothing. So the secret is to know the solubility tables. ...
Thursday, February 4, 2010 at 12:36pm by DrBob222
chemistry
Which of the following equations does not represent an oxidation-reduction reaction? 3Al + 6HCl → 3H2 + AlCl3 2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3 2H2O → 2H2 + O2 2NaI + Br2 → 2NaBr + I2 Cu(NO3)2 + Zn → Zn(NO3)2 + Cu
Sunday, November 28, 2010 at 7:45pm by Anonymous
Chemistry
how many grams of each species will be present at the end when 0.500g of copper is added to 2.500g of AgNO3? Cu(s) + 2 AgNO3(aq) --> 2 Ag(s) + Cu(NO3)2 (aq)
Wednesday, June 8, 2011 at 9:25pm by tc
CHEMISTRY
Two or three points here. If you let X = mass AgNO3 then 0.953 - X = mass Ba(NO3)2. First, if we set this up with just this information, the following is what you get. X + 0.953 - X = 0.953 and we end up with 0 = 0, which of course, is true but it doesn't help us much if ...
Wednesday, January 30, 2008 at 6:05pm by DrBob222
chemistry
Calculate how many moles of productwould be produced if .310 mol of the first reactant were to react completely. (a) CO2 + 4 H2 ¨ CH4 + 2 H2O CH4 _____ mol H2O _____ mol (b) C3H8 + 5 O2 ¨ 4 H2O + 3 CO2 H2O _____ mol CO2 _____ mol (c) 3 H2SO4 + 2 Fe &...
Thursday, January 6, 2011 at 6:43pm by Anonymous
Chemistry
I dont know if i am solving for the number moles of NaI correctly, i multiply .21 by 1.67, is that incorrect? i know that to solve this you have to find the limiting reagent, but i think the problem might be that i am solving for moles wrong. If 210 mL of 1.67 M aqueous NaI ...
Tuesday, April 20, 2010 at 12:07am by Tokey
Chemistry
There are a few rules that govern many products. Some we just memorize but most are governed by sets of rules. For example, there are synthesis reactions (the 4Al + 3O2 ==> 2Al2O3 is a synthesis reaction; i.e., we take two atoms and make a molecule.) decomposition ...
Tuesday, February 12, 2008 at 9:38pm by DrBob222
Chem
PbCl2 ==> Pb^2+ + 2Cl^- Ksp = )Pb^2+)(Cl^-)^2 NaCl ==> Na^+ + Cl^- Convert 3.1 mg NaCl to moles and M NaCl = mole/L soln where L soln = 0.228. Then Qsp = (Pb^2+)(Cl^-)^2 Substitute (Pb^2+) from Pb(NO3)2. Substitute (Cl^-) from NaCl M from above. If Qsp > ...
Friday, November 4, 2011 at 1:28am by DrBob222
chemistry
First calculate the molarity of Na2CO3 solution. M HCl = 109.5g x (1 mol/36.5g) = 3.00M mols HCl = M x L = 3.00 x 0.0329 = 98.0.09870. mols Na2CO3 = 1/2 that (from the coefficients in the balanced equation) = 0.04935 Now the titration with H2SO4 (note: 0.84N = 0.42M) Use ...
Saturday, February 16, 2013 at 9:15pm by DrBob222
Chemistry
Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �&#...
Friday, June 17, 2011 at 10:39am by Dexter
Chemistry
Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �&#...
Friday, June 17, 2011 at 10:39am by Dexter
Chemistry
For the first one I put 2NaOH (aq) + Pb(NO3)2 (aq) ==> Pb(OH)2 (s) + 2NaNO3 (aq) and for the second Pb(OH)2 (s) + 2NaOH (aq) ==> Na2Pb(OH)4 (aq) and it keeps saying the second one is wrong. I don't understand what's incorrect.
Friday, May 11, 2012 at 8:21pm by Sarah
chemistry
Step 1. Write molecular equation: Pb(NO3)2(aq) + Na2CO3(aq) ==> PbCO3(s) + 2NaNO3(aq) Step 2. Separate into ions; e.g., Pb^+2(aq) + 2NO3^-(aq) + etc. Solids (those with (s) are not soluble; therefore, do not separate them. Any weak electrolytes also stay as the molecule...
Tuesday, December 11, 2007 at 3:22pm by DrBob222
chemistry
1. Since Zn is higher on the activity series than lead, the reaction would be: Zn(s) + Pb(NO3)2(aq) ---> ZnCl2(aq) + Pb(s) The zinc container would dissolve displacing Pb from the solution. Not a good choice of container. 2. Ag(s) + PbSO4(aq) ---> No reaction (Ag...
Wednesday, July 2, 2008 at 8:44pm by GK
chemistry
Use the ΔH°f information provided to calculate ΔH°rxn for the following: ΔH°f (kJ/mol) SO2Cl2 (g) + 2 H2O(l) → 2 HCl(g) + H2SO4(l) ΔH°rxn = ? SO2Cl2(g) -364 H2O(l) -...
Wednesday, April 27, 2011 at 8:40pm by yr
chemistry
Calculate the equilibrium vale of Pb +2 (aq) in 1.00 L of saturated PbCl2 solution to which 0.250 mole of NaCl has been added. 60.0 ml of 0.0300 M NaCl 60.0mL of 0.0500 M Pb(NO3)2
Wednesday, April 13, 2011 at 10:35am by Carlos
Chemistry
which contains the lowest % of hydrogen? HCl H3PO4 H2SO4 H20 is it HCL?
Sunday, November 13, 2011 at 7:54pm by Matt
chemistry
I have no idea how to begin solving these problems... Calculate the normality of a 1.0 molal solution of each of the following acids: a. HCl b. H2SO4 c. H3PO4 Calculate the molality of a 1.0 normal solution of each of the following acids: a. HCl b. H2SO4 c. H3PO4
Thursday, February 7, 2013 at 10:54pm by Danny
Chemistry
How can you distinguish chemically between the following pairs of substances in one or two steps. a)HCl and H2SO4 b) KNO3 and K3PO4
Friday, May 21, 2010 at 8:26pm by Anonymous
Chem
in the reaction NO3+CaCl2=2AgCl+Ca(NO3)2, how many grams of excess will remain when 20 grams of AgNO3 are reacted with 15 grams of CaCl2
Monday, February 25, 2013 at 5:49pm by Dean
Chemistry - DrBob222
Wait, AgNO3 with any unknown with Cl present would form a precipatate. So I can use that to tell between HNO3 and HCl. So now is the whole thing correct?
Sunday, November 11, 2007 at 8:34pm by Raj
chemistry
It depends upon how concentrated it is initially. Boiling away so-called excess H2O probably won't work because HCl forms a constant boiling mixture at about 22% HCl. I'm at a slight disadvantage since I don't know all of the details of what you are trying to do ...
Friday, May 11, 2012 at 8:09am by DrBob222
Chemistry - Balancing Equations
Ca(OH) + H2SO4 -----> CaSO4 + H2O There is a typo Ca(OH)2 ; balancing is then easier. Ca(OH)2 + H2SO4 -----> CaSO4 + 2H2O 2Na2S2O3 + I2 -----> 2NaI + Na2S4O6 ZnCl + Na2S -----> ZnS + NaCl another typo here should be ZnCl2 which again make balancing ...
Monday, April 19, 2010 at 1:16am by Dr Russ
Science
hey can you tell the compounds names NOT their element names. 2HCL 2H2O 3NiBr2 2AlBr3 3Ni 3O2 2Al2O3 CaCl2 CaF2 AgNO3 KCl AgCl KNO3 2NH3 2H2O2 (NH4)2SO4 Ba(NO3)2 BaSO4 2NH4NO3 MgI2 Br2 MgBr SO3 H2SO4 6KCl Zn3(PO4)2 3ZnCl2 2K3PO4 or at least find me a website to find their names
Thursday, October 9, 2008 at 8:39pm by Alejandro
Chemistry
Ksp Pb(OH)2 = (Pb^2+)(OH^-)^2 Use 0.095M = (OH^-) and solve for Pb^2+. That gives M Pb^2+ to start pptn. M Pb^+2 = mols Pb^2+/L = mols Pb(OH)2/L. M Pb^2+ from above and L (4.00) give mols. Then mols= grams/molar mass. You know molar mass and mols, solve for grams and convert ...
Monday, April 1, 2013 at 9:40pm by DrBob222
Chemistry
write a net ionic equation for? 2KI + Pb(NO3)2 ==>2KNO3 + PbI2 This is my answer below 2I^- + NO3==>2No3 +I2^- can anyone tell me if this is the correct answer
Wednesday, June 10, 2009 at 6:52pm by Aparicio
Chemistry Honors
I need help balancing equations 1) CH4+O2-->CO2-->+H2O 2) Hf+N2-->Hf3N4 3) Mg+H2SO4-->MgSO4+H2 4) C2H6+O2 -->CO2+H2O 5) Pb(NO3)2 + NaI--> PbI2+NaNO3 6) Fe+O2-->Fe3O4
Wednesday, October 20, 2010 at 8:25pm by S
Chemstry
I just copied this because i have a couple more questions on this part.... Sulfuric acid/ Lead Battery: -the electrodes for the battery are composed of Pb(s), PbO2, and/or PbSO4. What are the half reaction occuring at each electrode? include electrolysis of water: Process ...
Monday, April 28, 2008 at 8:32pm by Sara
chemistry
2NaOH(aq) + Pb(NO3)2(aq) ==> Pb(OH)2(s) + 2NaNO3(aq) Pb(OH)2(s) + 2NaOH(aq) ==> Na2Pb(OH)4(aq)
Monday, February 13, 2012 at 6:35pm by DrBob222
Chemistry
First, let me correct the question. "..... to give metal chlorides + hydrogen or metal sulphates + hydrogen." 1. I think your answer is ok but you need to understand that concentrated H2SO4, especially if hot, gives a different kind of reaction to that of dilute ...
Sunday, January 25, 2009 at 10:48pm by DrBob222
Chemistry
Pb(s) + KNO3(aq) ----> No reaction HNO3(aq) + Sr(OH)2(aq) ----> H2O + Sr(NO3)2 NO3 being Nitrate, and (OH)2 meaning 2 Oxygen and 2 Hydrogen atoms in the second problem. The second two in the products of the second problem is a subscript for NO3. Are these correct...
Saturday, January 31, 2009 at 5:32pm by Momo
Chemistry (repost)
Pb(s) + KNO3(aq) ----> No reaction HNO3(aq) + Sr(OH)2(aq) ----> H2O + Sr(NO3)2 NO3 being Nitrate, and (OH)2 meaning 2 Oxygen and 2 Hydrogen atoms in the second problem. The second two in the products of the second problem is a subscript for NO3. Are these correct...
Saturday, January 31, 2009 at 7:25pm by Momo
Chemistry
A- a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula for this salt? B- a brown colored salt ...
Tuesday, April 3, 2012 at 2:32pm by Mima
Chemistry
A- a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula for this salt? B- a brown colored salt ...
Monday, April 2, 2012 at 7:29pm by Mima
Chemistry
Pb(no3)2 aq + NaSo4 aq ---> PbSo4 +2 NaNo3. I think thats right. except that o is oxygen. n isn't nitrogen. Sodium sulfate is Na2SO4. 1. Convert 7.00 g Pb(NO3)2 to moles. moles = grams/molar mass. 2. Convert 7.00 g Na2SO4 to moles. Same procedure. 3a. Using the ...
Tuesday, March 9, 2010 at 4:09am by DrBob222
chemistry
For the same volume and molarity it takes twice as much NaOH for H2SO4. HCl you are neutralizing 1 H ion. For H2SO4 you are neutralizing 2 H ions.
Sunday, June 26, 2011 at 11:08pm by DrBob222
Plese Help
IM sorry what i meant was their compounds hydrogen peroxide or carbon dioxide or fool's gold. 2HCL 2H2O 3NiBr2 2AlBr3 3Ni 3O2 2Al2O3 CaCl2 CaF2 AgNO3 KCl AgCl KNO3 2NH3 2H2O2 (NH4)2SO4 Ba(NO3)2 BaSO4 2NH4NO3 MgI2 Br2 MgBr SO3 H2SO4 6KCl Zn3(PO4)2 3ZnCl2 2K3PO4 or at least ...
Thursday, October 9, 2008 at 8:58pm by Alejandro
chemistry
agh3+no3
Monday, February 4, 2008 at 6:14pm by agno3+nh3
chemistry
Complete and balance the chemical equation using compound formulas. Include the states. If there is no reaction, enter NR. Pb(NO3)2(aq) + NaI(aq) → sine Pb is not reactive, the reaction is NR. Am i correct?
Tuesday, February 9, 2010 at 12:41am by blasting
chemistry
See the activity series. http://www.files.chem.vt.edu/RVGS/ACT/notes/activity_series.html A metal will displace any ION BELOW it in the activity series. Cu is ABOVE Ag but Cu is below Pb. Cu + 2AgNO3 ==> Cu(NO3)2 + 2Ag but Cu + Pb(NO3)2 ==> No reaction because Cu...
Thursday, November 17, 2011 at 12:32am by DrBob222
chemistry
Element Symbol Atomic Mass --------------------------------------- Bromine Br 79.904 Calcium Ca 40.078 Carbon C 12.011 Chlorine Cl 35.4527 Cobalt Co 58.93320 Copper Cu 63.546 Flourine F 18.9984032 Hydrogen H 1.00794 Iodine I 126.904 Iron Fe 55.847 Lead Pb 207.2 Magnesium Mg 24...
Tuesday, April 15, 2008 at 8:31pm by Chris
Chemistry
Two good questions. First, C6H12O4 + 7O2 --> 6CO2 + 6H2O , note that equations are balanced by using various coefficients (which you already know) and not changing subscripts (which you already know). Equations are balanced when a. # atoms on the left equal # atoms on ...
Thursday, July 15, 2010 at 8:13pm by DrBob222
chemistry
calcium nitrate + sulfuric acid =caso4+? write a balanced chemical equation for this reaction including states. Ca(NO3)2 + H2SO4 ==> CaSO4 + 2HNO3 You don't have enough information to provide states. CaSO4 will be a solid so you write CaSO4(s). H2SO4 will be (l) if ...
Monday, July 30, 2007 at 3:14am by walter
Chemistry
In the future, PLEASE tell us what you are doing. I am guessing that you have added AgNO3 to a Cl solution to ppt AgCl. The reason you add HNO3 is because you want an acid solution from which to ppt AgCl. AgOH and/or Ag2O (actually a hydrated silver oxide) ppts from a neutral ...
Tuesday, March 9, 2010 at 5:28am by DrBob222
Chem URGENT!
You have written the word equation. If you want the symbol equation it is Ni + Pb(NO3)2 ==> Ni(NO3)2 + Pb And in the word equation, probably you should have lead(II) nitrate and nickel(II) nitrate read as "nickel two nitrate" and "lead two nitrate".
Tuesday, March 11, 2008 at 1:52pm by DrBob222
chemistry
2KOH + H2SO4 = K2SO4 + 2H2O mols KOH = M x L = ? mols H2SO4 = 1/2 that--Look at the coefficients in the balanced equation. M H2SO4 = mols H2SO4/L H2SO4. You know L H2SO4 and mols, solve for M.
Thursday, September 13, 2012 at 5:07pm by DrBob222
chemistry
"Ag(s) reacts with none of the 4 (solutions of Ag^+2, Pb^+2, Cu^+2, Zn^+2}. So Ag(s) goes at the bottom of the table for now although there may be some metals below silver when you finish with the entire table. Cu(s) reacts with (Ag^+ solution) so Cu goes above Ag ion. It...
Monday, April 14, 2008 at 4:47pm by Joseph
Chemistry 114
You need to know the solubility rules to predict the products of some reactions. Here is a simplified set of rules. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html The second one is CuSO4(aq) + Pb(NO3)2(aq) ==> PbSO4(s) + Cu(NO3)2(aq) You turn this ...
Monday, April 12, 2010 at 6:01am by DrBob222
Chemistry
Which of the following pairs would make a good buffer solution in an aqueous solution? A) H2SO4 and NaHSO4 B) Ca(NO3)2 and HNO3 C) HCl and NaCl D) HF and NaOH E) none of them I know the answer is D but I don't understand why. I would think it would be C since a goo buffer ...
Wednesday, March 20, 2013 at 6:47pm by Jonah
Chemistry
The procedure I've designed so far is: 1) Look at colour, if blue, it is CuSO4. OK 2) Test a bit of unknown with Zn. If there is a reaction it has hydrogen. I don't know what you have in mind but this won't tell you much unless it's HNO3 or HCl and litmus paper...
Sunday, November 11, 2007 at 5:59pm by DrBob222
Maths
"at least one paperback (pb)" means 1 pb, or 2 pb, or 3 pb, or 4 pb. so direct way: 1 pb, 3hb ---> C(6,1) x C(12,3) = 1320 2 pb, 2 hb ---> C(6,2) x C(12,2) = 990 3 pb, 1 hb ---> C(6,3) x C(12,1) = 240 4 pb, 0 hb ---> C(6,4) x C(12,0) = 15 ...
Wednesday, October 8, 2008 at 12:40pm by Reiny
Chemistry (11th grade)
we have the following equation- 2HCl+CuSO4 yields H2SO4+CuCl2. the question is if 7 moles of HCl react, how many moles of H2SO4 will be produced?
Sunday, June 3, 2012 at 10:14pm by scott swing
Ap Chemistry
S + O2 = SO2 2SO2 + O2 ==> 2SO3 SO3 + H2O ==> H2SO4 This is a simple stoichiometry problem made a little more complicated because you must deal with three reactions instead of one. You COULD work three problems (For example: 49 mols S will prepare x mols SO2, x ...
Thursday, September 6, 2012 at 1:18pm by DrBob222
Chemistry
2KI + Pb(NO3)2 ==>2KNO3 + PbI2 You know the actual yield was 25.0 grams. Since it was 78.1% yield, then %yield = [(actual yield/theoreticalyield)]*(100 = 78.1. Substitute 25.0 for actual yield and calculate theoretical yield. Convert to moles PbI2, then use the ...
Wednesday, June 10, 2009 at 3:54pm by DrBob222
Chem
Hydrochloric acid can be prepared using the reaction described by the chemical equation: 2 NaCl(s) + H2SO4(l) ----> 2 HCl(g) + Na2 SO4(s). How many grams of HCl can be prepared from 393 g of H2SO4 and 4.00 moles of NaCl? A) 4.00 g B) 2.49 g C) 146 g D) 284 g E) None of ...
Wednesday, April 11, 2007 at 4:00pm by Jessica
chemistry
I'll get you started. (0.75 moles Al(NO3)3/L Al(NO3)3) x 0.040 L Al(NO3)3 = ??moles Al(NO3)3. Note that L Al(NO3)3 in the numerator cancel with L Al(NO3)3 in the denominator to leave moles Al(NO3)3. Now you need a factor to convert moles Al(NO3)3 to moles NO3^-.
Monday, August 22, 2011 at 9:57pm by DrBob222
chemistry
Let's work backwards. M = moles/L Do we know L AgNO3? Yes, 14.7 mL or 0.0147 L. Do we know mole? No. Where can we get that? Look at the PbI2 (that's all that's left. right?) PbI2(sat'd) ==> Pb^2+ + 2I^- Ksp = (Pb^2+)(I^-)^2 = Ksp. You know Ksp, You can ...
Friday, March 16, 2012 at 9:00pm by DrBob222
Chemistry
Draw a line, something like this, at the bottom of the equation connecting Ag and AgNO3. |_______________|. Write zero under Ag and +1 under Ag of AgNO3. Now draw another line upside down from the one above and place it above the equation connecting N of HNO3 and N of NO2...
Saturday, May 28, 2011 at 10:30pm by DrBob222
Chemistry
2KOH + H2SO4 ==> K2SO4 + 2H2O moles KOH = M x L = 0.0469 x 0.720 mols H2SO4 = 1/2 that from the equation. M H2SO4 = moles H2SO4/L H2SO4. Solve for L and convert to mL.
Wednesday, October 12, 2011 at 7:00pm by DrBob222
AP Chemistry
(a) When 300.0 milliliters of a solution of 0.200 molar AgNO3 is mixed with 100.0 milliliters of a 0.0500 molar CaCl2 solution, what is the concentration of silver ion after the reaction has gone to completion? 2AgNO3 + CaCl2 ==> 2AgCl + Ca(NO3)2 initial: AgNO3 = M x L...
Monday, April 5, 2010 at 6:16pm by DrBob222
Chemistry
AgNO3+FeCl3 --> AgCl+Fe(NO3)3 In an experiment, it was planned to mix a solution containing 25 g of AgNO3 with another solution containing 45 g of FeCl3. a) What is the maximum number of moles of AgCl that could be obtained? I already found the limiting reagent, I just ...
Friday, March 9, 2012 at 1:53am by Jamie
Chemistry
Pb^2+(aq) + S^=(aq) ==> PbS(s) Pb^2+(aq) + 2Cl^-(aq) ==> PbCl2(s) Note: Both reactions will not take place unless there is enough Pb^2+ to ppt BOTH. PbS will ppt first and if there is enough lead ion present, PbCl2 will ppt next.
Friday, April 29, 2011 at 4:36pm by DrBob222
chemistry
thanks for any help with these translations into scientific notation: 1. magnesium ribbion is dropped into an aqueous solution of hydrochloric acid 2. a solid peice of copper is burned in pure oxygen 3. zinc carbonate is strongly heated in a crucible 4. calcium chloride is ...
Friday, January 19, 2007 at 10:21am by key
Chemistry-HELP!!!
Show the side reactions and products that can occur when 1-butanol is treated with NaBr and H2SO4. R-OH (yields:NaBr and H2SO4) 1-bromobutane + water + sodium bisulfate This question was posted before, but I have the same question and seriously need help!!!
Wednesday, October 31, 2007 at 1:49pm by Paul
chemistry
Cl^- in NaCl = 0.1 mol Cl^- in CaCl2 = 0.1 mol x 2 = 0.2 mol Total Cl^- = 0.3 mol/1 L = 0.3 M AgNO3 + Cl^- ==> AgCl + NO3^- Cl^- = 0.3 mols So what must AgNO3 be to react with all 0.3 mol Cl^-?
Wednesday, October 3, 2007 at 11:20pm by DrBob222
Chemistry
3. Which oxidation-reduction reactions are best balanced by the half-reaction method? A.) covalent reactions *B.)acid-base reactions C.) ionic reactions D.) intermolecular reactions Thank you.
Saturday, March 23, 2013 at 9:50am by Anonymous
Chemistry
1.Calculate the Theoretical and % Yields of the following equation: 2.What is the limiting and excess reactant? 3.How much excess remains? 2AgNO3 + CaCl2 -> 2AgCl + Ca(NO3)2 mass of 2AgNO3= 1.5g mass of CaCl2= 1.1g (What I have so far): AgNO3: 1.5g(AgNO3) 2mol/170g = 0....
Thursday, January 19, 2012 at 12:50pm by Feloniz
chemistry
Balance each of the following neutralization reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. Part A: HNO3(aq) + Ba(OH)2(s) ---> Ba(NO3)2(aq) + H2O(l) Part B: H2SO4(aq) + Al(OH)3 ---> Al2(SO4)3(aq) + H2O(l)
Sunday, April 1, 2012 at 12:01pm by Lisa
chemistry
Balance each of the following neutralization reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. Part A: HNO3(aq) + Ba(OH)2(s) ---> Ba(NO3)2(aq) + H2O(l) Part B: H2SO4(aq) + Al(OH)3 ---> Al2(SO4)3(aq) + H2O(l)
Sunday, April 1, 2012 at 12:00pm by Lisa
Chemistry
No. But Pb + Cu(NO3)2 will react.
Monday, April 1, 2013 at 8:19pm by DrBob222
Chemistry
Does Pb(NO3)2 + Cu has a reaction? if so, what will it be?
Monday, April 1, 2013 at 8:19pm by LG
chemistry
Correction : Pb(NO3)2 2.0mL
Wednesday, March 10, 2010 at 2:10pm by BT
Science
A chemist is studying the following equilibrium: 2Pb(NO3)2 (s) ! 2PbO (s) + 4NO2 (g) + O2 (g) He starts out with 10 g of Pb(NO3)2 and, at equilibrium, has 2.02 g of PbO. The concentrations of NO2 and O2 at equilibrium are 0.25 M and 0.019 M, respectively. What is the value of ...
Thursday, June 30, 2011 at 11:15pm by Megan
Chemistry
i get that part, but how do i calculate with 1.97 grams of Pb(OH)2 (S), because i need the Pb molarity to calculate for Ksp and that value gives me Pb(OH)2 not just the Pb?
Monday, May 11, 2009 at 9:11pm by Anonymous
Chemistry 1 H
AgNO3+ BaCl2-> AgCl+ Ba(NO3)2 a. balence the equasion b. How many grams of silver chloride(AgCl) are produced from 5.0g of silver nitrate (AgNO3) reacting with an excess of barium chloride(Ba Cl2)? c. How Many grams of barium chloride (BaCl2) is necessary to react with...
Thursday, January 4, 2007 at 5:57pm by Lexi
chemistry
1.0 M aqueous solutions of AgNO3 , Cu(NO3 )2 and Au(NO3 ) 3 are electrolyzed in the apparatus shown, so the same amount of electricity passes through each solution. If 0.10 moles of solid Cu are formed how many moles of Ag and Au are formed?
Friday, April 27, 2012 at 6:20pm by James
Chemistry
Al+NO3^-1-->Al(OH)4^-1+NH3 can someone please help me get started on this redox balancing equation. I have a list of all the steps but I am stuck at the part where I split them into 2 seperate half reactions, Al--->Al NO3---->OH4- + NH3 is that correct? or...
Wednesday, June 10, 2009 at 8:15pm by Anonymous
Chemistry
Let x = solubility of Pb(OH)2 in mols/L. Pb(OH)2 ==> Pb^2+ + 2OH^- ....x........x.......2x Ksp = (Pb^2+)(OH^-)^2 Substitute from the chart above and solve for x, find 2x, then convert to pH.
Thursday, April 5, 2012 at 8:56am by DrBob222
Chemistry
Start with 0.045M. If we ppt 99.9% it means we leave 0.1% which in decimal form is 1E-3M for Pb^2+. Therefore (Pb^+) = 1E-3*0.045 = 4.5E-5. PbCl2 ==> Pb^2+ + 2Cl^- Ksp = (Pb^2+)(Cl^-)^2 You know Ksp and you know the Pb you want, solve for Cl^-.
Sunday, March 4, 2012 at 3:17pm by DrBob222
Chemistry
I think it was 35 mL of 0.1M AgNO3, not AgCl. When the two solutions are mixed the reaction is: 2AgNO3(aq) + MgCl2(aq) ---> AgCl(s) + Mg(NO3)2(aq) Moles of AgNO3 = (0.035L)(0.1mol/L) = 0.0035 moles of AgNO3. Moles of Ag+ ion = 0.0035 also. Likewise, moles of MgCl2 = (0....
Monday, September 1, 2008 at 10:59am by GK
Chemistry
Can anyone tell me why the answer that I got here is not correct? Pb(s) + AgNO3(aq) yields Ag(s) + PbNO3(s)
Wednesday, October 27, 2010 at 7:21pm by Josh
chemistry
balance: CaCl2 + AgNO3 → AgCl + Ca(NO3)2
Monday, January 7, 2013 at 1:32pm by martina
College Chemistry
Pb+NO3+Na2SO4-->?
Monday, September 27, 2010 at 12:42am by KELLY
Chemistry
does BaCl2+Pb(NO3)2 form a percipitate
Sunday, December 27, 2009 at 1:28pm by Dylan
College Chemistry
How many moles do you want? That's M x L = ? Then mols AgNO3 = grams AgNO3/molar mass AgNO3.
Thursday, September 27, 2012 at 6:29pm by DrBob222
Chemistry Redox Reaction
Cu(s)+NO3^-1(aq)-->Cu^2+(aq)+NO(g) Using the ion-electron method, 1) The incomplete half reactions are: Cu(s) —> Cu^2+(aq) NO3^-(aq) —> NO(g) 2) We use electrons, e^-, hydrogen ions, H+(aq), H2O, and OH^-(aq) to balance for electrical charge and ...
Thursday, June 4, 2009 at 11:28am by GK
chemistry
Look at reaction 2. I will focus on that. Obviously this is a good bit of work and I can't do the entire problem for you. But this will give you an idea what to do. Observations: Ag(s) reacts with none of the 4 (solutions of Ag^+2, Pb^+2, Cu^+2, Zn^+2}. So Ag(s) goes at ...
Sunday, April 13, 2008 at 11:25pm by DrBob222
chemistry
2KOH + H2SO4 ==> K2SO4 + 2H2O moles H2SO4 = M x L = ? moles KOH = M x L = ? It takes 1/2 mole H2SO4 for every mole of KOH so we use 0.080 moles H2SO4. How much H2SO4 remains? That will be moles H2SO4 - 1/2 moles KOH = ?? Then M H2SO4 = moles remaining/total volume in ...
Tuesday, October 4, 2011 at 2:35pm by DrBob222
Chemistry
a 2.16g sample of Pb(NO3)2 is heated in an evacuated cylinder with a volume of 1.18L. the salt decomposes when heated: 2Pb(NO3)2 (s)_> 2PbO (s) +4NO2 (g) +O2 (g) Assuming complete decomposition, what is the pressure in the cylinder after decomposition and cooling to a ...
Tuesday, January 3, 2012 at 5:16am by mary
chemistry
Pb^2+ + HCl ==> PbCl2 + 2H^+ mols Pb^2+ = grams/atomic mass Convert mols Pb^2+ to mols PbCl2 (Use the coefficients to do this) Convert mols PbCl2 to grams. g = mols x molar mass.
Thursday, January 24, 2013 at 8:44pm by DrBob222
chemistry
Use the reaction below to determine the volume of 0.123 M AgNO3(aq)that is needed to form 0.657 g of Ag2SO4 (s). 2AgNO3(aq) + H2SO4(aq) ¨ Ag2SO4 (s) + 2HNO3(l) 2AgNO3 + H2SO4-----Ag2SO4 + 2HNO3
Friday, June 17, 2011 at 9:14am by katydid
chemistry
Yes, NaHCO3 is widely used for neutralizing HCl and H2SO4 spills. NaHCO3 + 2HCl ==> H2O + CO2 + NaCl 2NaHCO3 + H2SO4 ==> Na2SO4 + 2CO2 + 2H2O
Saturday, November 6, 2010 at 7:47pm by DrBob222
Chemistry
One more problem with 1/2 reactions Pb(s) + PbO2(s) + 2H2SO4(aq)->2PbSO4(aq)+2H2O(l). How do you split them up with two Pb solids on the same side of the equation? Again you need to identify what is being reduced and what is being oxidised. I think I read the question ...
Thursday, April 19, 2007 at 10:00am by amy
Chemistry
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O mols NaOH = M x L = ? mols H2SO4 = 1/2 that (look at the coefficients) M H2SO4 = mols H2SO4/L H2SO4 Solve for M.
Thursday, January 24, 2013 at 7:16pm by DrBob222
Chemistry
E = Eo -0.06/2*log(1/(Pb^+2) If Pb^+2 + SO4^= -->PbSO4. Therefore, the addition of sulfate causes the PbSO4 to ppt thus decreasing the (Pb^+2). What does that do to the E value for Pb and how will that affect the cell voltage?
Saturday, February 13, 2010 at 7:43pm by DrBob222
Chemistry
Hi, I was given the reactants for the chemical reaction and I am supposed to write the product. The equation must be balanced. Can someboy please check my work? Thanks :-) 3NaOH + Fe(NO3)3 --> Fe(OH)3 + 3Na(NO3) 2NH3 --> N2 + 3H2 2H2 + o2 --> 2H2O 4Mg + ...
Saturday, December 9, 2006 at 8:44pm by Lisa
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