Search: is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase

Number of results: 29,653

chemistry
HCl + NaOH ==> NaCl + H2O At zero mL. YOu have 0.1 M HCl so the pH is pH = -log(H^+). Since HCl is a strong acid, H^+ = 0.1 M and pH = 1. All of the others are done this way: a. moles HCl initially = M x L = 0.025 x 0.1 = 0.0025 moles HCl. b. moles NaOH added. (at 5 mL ...
Friday, April 30, 2010 at 12:08pm by DrBob222

Chemistry
c1v1 = c2v2 c = concn v = volume Then subtract the 25.0 mL to find volume that must be added. And the volume that must be added is IF the volumes are additive.
Monday, April 23, 2012 at 11:37am by DrBob222

chemsitry
1)100ml sample of solution that is 0.2M in both Naf and Hf has 4.0 ml of 1.0M hcl added to it. calculate the ph change of this soultion .ka =7.2*10^-4 2)40 ml of 0.32M benzoic acid if titrated with 60 ml of 0.2 M naoh. clacilate the ph of the resulting solution at the ...
Sunday, March 4, 2012 at 7:24pm by Anonymous

chemistry
1)100ml sample of solution that is 0.2m in both Naf and Hf has 4.0 ml of 1.0m hcl added to it. calculate the ph change of this soultion .ka =7.2*10^-4 2)40 ml of 0.32m benzoic acid if titrated with 60 ml of 0.2 m naoh. clacilate the ph of the resulting solution at the ...
Sunday, March 4, 2012 at 6:28pm by Anonymous

Chemistry
Mg(OH)2 + 2HCl ==> MgCl2 + 2H2O millimols HCl added = mL x M = 100 x 0.2893M = 28.93 total acid added. mmols HCl not used = 25.20 mL x 0.1007 = 2.538 for a 10 mL portion of the above acid; therefore, if 100 mL had been titrated you would have used 25.38 mmols NaOH which...
Tuesday, May 7, 2013 at 9:28pm by DrBob222

Math
ost = 100 + 125 + 150 + 175 + for 9 terms This is an arithmetic series a = 100 d = 25 n = 9 Sum(9) = (9/2)(2(100) + (9-1)(25)) = (9/2)(200 + 200) = 1800 2) amount = 500(1.05)^10 = 814.45
Sunday, August 7, 2011 at 11:13pm by Reiny

11th grade ..CHEMISTRY
This is a Quantitative Redox titration. (KMnO4) = 1.8 G.. 500 ML after the experiment we had to record the data of the 3 trials. 1. Trial - VolUme FeSO4 = 10.00 Ml - VOlume KMnO4 11.00 Ml 2. Trial - VolUme FeSO4 = 10.00 ML - VOlume KMnO4 11.15 Ml and we ran outa the solution...
Wednesday, November 5, 2008 at 5:16pm by Komal

chemistry
given the density of acetic anhydride to be 1.05 g/mL, what was the mass of the acetic anhydride added to the reaction? How many moles of acetic acid were added?
Tuesday, March 29, 2011 at 8:44pm by kendalyn

MATHS
the way I understand the wording ..... new length/20 = 3/2 new length = 30 new width/10 = 7/3 new width = 70/3 new area = 30(70/3) = 700 old area = 20(10) = 200 increase = 500 percentage increase = 500/200 * 100% = 250%
Thursday, July 19, 2012 at 11:02am by Reiny

Chemistry
If you know it is 20.0 mmol/L, that is 10.0 mmol in 500 mL for NaCl as well as for Na^+ and that is 0.010 mol. grams = mols x molar mass = 0.01 x atomic mass Na. It may be that you don't know it is exactly 20.0 mmol/L and the AgNO3 is to tell you the exact concn. 0.2866g ...
Monday, June 4, 2012 at 12:06pm by DrBob222

advanced algebra
9b^4 - 200 = (3b^2 - √200)(3b^2 + √200) = (√3b - √√200)(√3b + √√200)(3b^2 + √200) where √√200 means the 4th root. Not sure how far you want to go with this. We could ...
Thursday, November 24, 2011 at 7:19pm by Steve

math
x = amount invested in the 15% account x*.15*3 + (500-x)*.1*3 = 200 x = 333.33 so, 500-333.33 = 166.67 at 10%
Wednesday, June 20, 2012 at 11:57am by Steve

chemistry!
If the chemist mistakenly makes 275 mL of solution instead of the 200 mL, what molar concentration of sodium nitrate will the chemist have actually prepared? Answer in units of M
Sunday, April 22, 2012 at 9:36pm by please help

Calculus Max Profit
"Assume the number sold is a linear function of the price" but no information is given on the price elasticity, so we will assume, in general, an increase in price of $1 will increase sales by m units. Under normal supply-demand curve, m is necessarily negative, of ...
Thursday, August 2, 2012 at 2:34pm by MathMate

Accounting
At the beginning of April, Owl Corporation has a balance of $12,000 in the Retained Earnings account. During the month of April, Owl had the following external transactions. 1. Issue common stock for cash, $10,000. 2. Provide services to customers on account, $7,500. 3. ...
Friday, April 13, 2012 at 6:31pm by John

GEN CHEM
Let x = mL base pH = pKa + log(base)/(acid) 5.00 = 4.699 + log(0.1x)/(200-x)*0.2 Solve for x and 200-x
Tuesday, April 26, 2011 at 1:13am by DrBob222

Dr.Bob (about finding the ml of ethanol)
Do you have a lab text book? Perhaps it is written by Pavia or others. In many text books there is a graph of the solubility of sulfanilamide vs temperature for 95% ethanol... Look at the graph and determine the solubility at 78 deg C. Hint - it is bigger than 200 mg/mL. To ...
Monday, September 3, 2007 at 10:11pm by Dr Joe

College Chemistry/Lab Math
Why did you multiply 0.0001g of gold/mL by 0.10mL? Shouldnt it be .50 mL? I say this because .10 is the volume of serum added, which does not contribute to the total amount of gold in the final solution.
Sunday, March 17, 2013 at 1:46pm by James

Chem
A 0.1098 g sample of copper metal is dissolved in 34 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 209.5 mL. (Calculate the molarity of Cu2+.)
Wednesday, November 2, 2011 at 8:19pm by ALMA

Chemistry (General)
When 280. mL of 1.50 x 10-4 M hydrochloric acid is added to 135 mL of 1.75 x 10-4 M Mg(OH)2, the resulting solution will be: acidic. basic neutral. It is impossible to tell from the information given.
Monday, October 11, 2010 at 8:14pm by Larry

Chemistry
Pure water boils at 100ºC (212ºF). When a substance is added to the water the boiling point increases due to what is referred to as the boiling point elevation. (a) What is the molecular mass of sucrose (C₁₂H₂₂O₁&...
Sunday, March 18, 2012 at 9:47am by Hannah

Chemistry
A 100 milliliter sample of 0.100-molar NH4Cl solution was added to 80 milliliters of a 0.200-molar solution of NH3. The value of Kb for ammonia is 1.79 x 10^-5. (a) What is the value of pKb for ammonia? (b) What is the pH of the solution described in the question? (c) If 0.200...
Monday, April 26, 2010 at 8:58pm by Nicole

Finance
Winnebagel Corp. currently sells 33,000 motor homes per year at $49,500 each, and 13,200 luxury motor coaches per year at $93,500 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 23,100 of these campers per year at $13,...
Saturday, February 4, 2012 at 7:10pm by William

chemistry
If 215.0 mL of water are added to a 237 mL sample of a 1.702 M dextrose solution, what is the new molarity of dextrose in the resulting solution?
Friday, December 2, 2011 at 1:10pm by B

CHEM EQB
How many ml of 0.2M NaH2PO4 should b added to 40 mL of 0.1M Na3PO4 to make the buffer pH 7.2. Ka1:1.1 x 10^-2 Ka2:7.5 x 10^-8 Ka3:4.8 x 10^-13
Tuesday, November 6, 2012 at 12:56pm by NIC

Chemistry
How much volume(mL)of 2.50 M NaOH(aq)must be added to 25.0 mL of water to produce a 1.50 M NaOH solution? Thanks!
Monday, April 23, 2012 at 11:37am by Jack

Chemistry 2
If 20 mL of .10 M H2SO4 was added to 50 mL of .10 M NaOHand the mixture was stirred, then tested with a pH meter. What is the pH?
Tuesday, March 13, 2012 at 4:40pm by Brin

chemistry
How many ml of water at 10 degrees c must be added to 75 ml of water at 35 degrees c to obtain a final temperature of 19 c?
Saturday, December 11, 2010 at 1:43pm by Sai

Chemistry
A 50.0 mL sample of 0.10 M pyridine, C5H5N, is titrated with 0.2 M HBr. Calculate the pH to one decimal place when the following volumes of titrant have been added. 0.00 mL a) 0ml b)17ml c)25ml d)40ml
Thursday, March 7, 2013 at 8:03pm by Katie

Chemistry
I'm a little confused by the problem. USUALLY a statement that the buffer is 0.1M HEPES means that the acid form + basic form = 0.1M; however, with no pH given there is no way to calculate the ratio of the acid form to the base form. Therefore, I must assume that this is 0...
Friday, March 8, 2013 at 6:26pm by DrBob222

algebra
I need to know if i did these questions right. The main problem: A certain Metropolitan area is building a new Performing Arts Center with two auditoriums to be used as concert venues. Budget: 89,200,000 for construction cost 5,300,000 for land 1. What integer represents the ...
Thursday, November 5, 2009 at 7:05pm by newcomb

math
I need to know if i did these questions right. The main problem: A certain Metropolitan area is building a new Performing Arts Center with two auditoriums to be used as concert venues. Budget: 89,200,000 for construction cost 5,300,000 for land 1. What integer represents the ...
Thursday, November 5, 2009 at 6:55pm by newcomb

3rd grade math
Indicate subject in subject space rather than just your grade level. Don't know what the @ means in math. 500/4 = 500 divided by 4 = 125 500 * 4 = 500 times 4 = 2000 500 - 4 = 496 500 + 4 = 504 I hope this helps.
Saturday, January 9, 2010 at 1:54am by PsyDAG

chemistry
g HCl added = 220 mL x 1.16 g/mL x 0.314 = ? mols HCl = ?/36.5 = x. M = mols/L = [xmols/(1/2)*3.785] = (OH^-) Check my work carefully.
Tuesday, October 9, 2012 at 6:08pm by DrBob222

Chemistry
Calculate z pH of a buffer solun containing o.1 M acetic acid & 0.1 M solun of sodiumacetate when 1 mL of 0.1M HCl is added to 100 mL of buffer .
Tuesday, December 6, 2011 at 2:39pm by Ethio

Chemistry
If 7 mL of water is added to 3 mL of a 0.50 M KOH solution, the concentration of KOH is changed to? I am not sure how to go about doing this. Please help, thank you!!! Would I do (7)(3) / 0.50?
Tuesday, October 11, 2011 at 9:19pm by Hannah

Chemistry
A solution of HCL (.1053 M) is added to a solution of NaOH (50.0 mL) It takes 28.31 mL if the acid to neutralize the base (naOH).
Sunday, October 2, 2011 at 11:52pm by Nola

Chemistry
A 50.0-mL sample of 0.10 M HNO2 is titrated with 0.10 M NaOH. What is the pH after 25.0 mL of NaOH have been added?
Tuesday, December 7, 2010 at 8:50pm by Eric

chemistry
how much water (in mL's) needs to be added to 330 mL's of a 3.33 molar solution of lithium bromide to make the solution 1.44 molar
Wednesday, October 13, 2010 at 1:51pm by stan

chemistry
I have no idea BUT you can get close. 0.5% w/v means 0.5 g NaCl/100 mL SOLUTION. 0.5 g x (375/100) = 1.875 g NaCl/375 mL of SOLUTION. How much water that must be added to make 375 mL of solution s not known without the density of 0.5% NaCl w/v. If you assume that adding 1.875 ...
Monday, December 3, 2012 at 6:29am by DrBob222

chem
0.044% means 0.044 g/100 g soln or 0.044 g/100 mL (Technically this is 0.044 g/(100-0.044) but for very dilute solutions we usually ignore that small difference. 0.044 g/100 is how many g in 6.5L? That is 0.044 g x 6,500 mL/100 mL = ??
Wednesday, March 9, 2011 at 6:27pm by DrBob222

Chemistry
Calculate the amount (g) of each of the following salts that need to be added to a 200 mL volumetric flask to produce a 2 M solution of S. CaSO(subscript 4) [NH(subscript 4)subscript 2]SO(subscript 4) NOTE: the subscript 2 is outside the (NHsubscript 4) Fe(subscript 2)[(...
Saturday, January 19, 2013 at 11:51am by Sejul

Org. Chem.
what is the precipitate formed when HCl is added? I believe the answer is NaCl, but I am not sure and this precipitate only formed in the first NaOH extract, as precipitate was essentially nonexistent in the 2nd extract? Below is what was done in the experiment. Also, does the...
Monday, September 21, 2009 at 10:38pm by CM

Chemistry
No, I'm sorry I didn't see it. Those get buried after a page or two. You added 75.0 mL HCl initially. It reacted with the tablet and used up all of its neutralizing power. So mmoles HCl added initially = mL x M which we've done. But you had some HCl left over ...
Monday, October 18, 2010 at 10:04pm by DrBob222

chemistry
Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). Delta pH=? Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution. Delta pH=?
Sunday, July 8, 2012 at 11:17pm by rachel

Chemistry HELP!
In order to standardize a KMnO4 solution, 0.3498 g Na2C2O4 was dissolved in 30 mL water and 15 mL 3.0 M H2SO4. The KMnO4 solution was added to the Na2C2O4 solution until a pale pink color persisted. The titration took 29.5 mL of KMnO4 solution. What is the concentration of ...
Monday, May 6, 2013 at 11:25am by Prue

chemistry
the level of water in a graduated cylinder is 52.7 ml. After a solid object weighing 100 g is added, the level is 87.4 ml. What is the density of this object?
Sunday, October 14, 2012 at 10:14pm by mark

chemistry
mLa x Ma = mbL x Mb Solve for mL which will be the final volume. Assuming the volumes are additive, the ADDED water will be final volume - 10 mL.
Thursday, February 10, 2011 at 10:11pm by DrBob222

chemistry
An ethylene glycol solution is mad using 58.5g of (C2H6O2) and diluting to a total volume of 500.0 mL. Calculate the freezing and boiling point. Assume a density of 1.09 g/ml for the solution
Saturday, November 5, 2011 at 9:49am by Monique

chemistry
For pH = 6 we want the final H^+ to be 1 x 10^-6 M. Since this is so close to the equivalence point, the final volume will be essentially 100 mL or 0.1 L. Therefore, we want 1 x 10^-7 moles in the 100 mL. We had 0.005 moles if we took 50 mL of 0.1 M HCl. We have left 1 x 10^-7...
Thursday, March 4, 2010 at 12:35am by DrBob222

Chemistry
Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of ...
Wednesday, November 9, 2011 at 5:12pm by Alex

CHEMISTRY
Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of ...
Wednesday, November 9, 2011 at 4:42pm by Alexander

Chemistry
Is 10.0 mL of 0.10 M NH4Cl added to 10.0 mL of 0.10 M HCl a basic buffer? I think Yes. Right?
Thursday, May 6, 2010 at 11:11pm by Jim

Chemistry
Yes and no. (acid) is not 1.8E-5; that's ka for acetic acid. You put 250*0.56 for base and mL*0.500 for acid; solve for mL acid.
Tuesday, April 10, 2012 at 10:43am by DrBob222

chemistry
If you are given a 2.0 M solution of sucrose, describe in detail how you would make the following solutions (include specific glassware): a. 500 ml of 1.2M sucrose b. 300 ml of 0.55M sucrose
Monday, May 26, 2008 at 10:05pm by johnny

biochemistry
What is the composition of 21 g NaCl in 500 ml solution (density 1.12 g/ml) in % (w/w)? 1. 0.375% 2. 21.25% 3. 3.75% 4. 4.75% 5. 2.125%
Wednesday, February 16, 2011 at 7:26pm by Anonymous

Analytical Chemistry
Unfortunately, my KIO3 was given to me in mL from my professor so i have no clue what the grams of KIO3. I tried to figure out the moles of Na2S2O3 solution but looking over it i believe that 0.28 M is incorrect. The info I have is: 2.6g of Na2S2O3 was added to roughly 1 mL of...
Monday, October 11, 2010 at 10:12pm by Max

Chemistry
The secret to these problems is to know where you are on the titration curve; i.e., beginning (0 mL), equilvalence point, before the eq pt or after the eq pt. You can calculate the eq pt easily. mL acid x M acid = mL base x M base (that is always true for MONOPROTIC acids ...
Tuesday, April 23, 2013 at 1:22am by DrBob222

Biochemistry
In one glass - 100,0 mL 0,100M KOH solution, in other - 100,mL 0,100M HNO2 solution. What is pH of solution, which was get when both solutions were mixed up (consider that V of forthcoming solution is sum of original solutions - 200,0 ml)
Tuesday, March 27, 2012 at 2:22pm by Anonymous

chemistry
Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2CH2COOH with 0.1000 M NaOH after 26.5 mL of the base have been added. Ka of butanoic acid = 1.54 x 10-5.
Sunday, October 31, 2010 at 8:41pm by karla

Chemistry
50 mg/mL x ?mL = 120 mg 75 mg/mL x ?mL = 10 mg Solve for mL in each case, then, add ?mL and ?mL = total mL.
Thursday, January 27, 2011 at 2:04pm by DrBob222

Chemistry
How many grams of formaldehyde, H2CO, are in 500 ml of a 40% solution of formaldehyde in water? (Assume for this problem that the density of the formalin solution is 0.98 g/ml)
Monday, September 19, 2011 at 5:40pm by Kelsey

chemistry
A 500 mL sample of solution of H2SO4 was titrated with 60 mL of 1.5 M KOH. What was the molarity of the H2SO4 sample?
Saturday, October 13, 2012 at 9:07pm by Lisa Davies

Chemistry
At the equivalence point in a titration you know the volume (x mL) of a standard solution of acid (2.5 M) that has been added to a known volume base (y mL). show how you can determine the concentration of the base.? Explain
Friday, March 15, 2013 at 2:09am by Juan

chemistry
What is the density of a 28.87 g irregularly shaped object if the initial volume of water was 24.7 ml and the volume rose to 64.1 ml after the object was added?
Wednesday, February 20, 2013 at 2:39pm by mariam

Analytical Chemistry
Consider the titration of 100.0 mL 0.1 M KOH with 1.0 M HBr. Find the pH at the following volumes of acid (Va) added: Va= 0, 1, 10 and 10.1 mL.
Saturday, November 26, 2011 at 4:36pm by Remy

health
you now have 1gram of antibiotic in 110ml of water. I do not know what a d5w is. Your concentration is 1000mg/110 ml or 9.09 mg/ml You know of course, it is no longer d5w...you added water to it.
Tuesday, August 16, 2011 at 5:07pm by bobpursley

chemistry
If 10.0 mL of 0.250 mol/L NaOH(aq) is added to 30.0 mL of 0.17 mol/L HOCN(aq), what is the pH of the resulting solution?
Saturday, April 5, 2008 at 9:41pm by Tim's Titration Lab

chemistry
B + H^+ ==> BH^+ In 500 mL of the buffer we have millimols of B = 500 x 1.05 = 525 BH^+ = 500 x 0.750 = 375 add 0.005 = 5 millimols HCl. ...........B + H^+ ==> BH^+ initial...525.........375 add............5.............. change.....-5...-5....5 equil.....520...
Monday, April 9, 2012 at 11:35am by DrBob222

Biology
how many mL of concentrated (15 M) hydrochloric acid (HCL) are required to prepare 500 mL of 6 M hydrochloric acid?
Tuesday, October 4, 2011 at 5:18pm by Neika

Basic Accounting
Complete an Income Statement, Statement of Owner's Equity, and Balance Sheet using the information provided below for Rya’s Planning Services. Cash… …… ……… … … … ………$21,500 Accounts Receivable……&#...
Thursday, July 7, 2011 at 8:58pm by MaS

Chemistry
If 200 ml of gas held at a constant pressure has a starting temperature of 300 degrees K, and it expands to fill a 300 ml space, what would be the new temp? (I got 454.54) Thanks!
Thursday, June 4, 2009 at 9:08pm by Kaylene

Chemistry
A student placed 17.0 g of glucose (C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
Wednesday, July 7, 2010 at 8:31pm by Tiffany

chemistry please help me please!!!
When one student did this experiment, he started with 19.5 mL of 0.118 M monoprotic acid. The endpoint was reached when 17 mL of base was added. What was the concentration of the base?
Monday, July 9, 2012 at 7:29pm by Sabrina

chemistry
when 15.12 ml of 0.1194 M NaOH is added to 25.00 ml of 0.1246 M HX ( an unknown weak acid), the resulting pH is 5.9. What is the Ka of the unknown acid?
Tuesday, February 1, 2011 at 6:36pm by kelis

AP Chemistry
In the titration of 50.0 mL of 1.0 M CH3NH2 (kb=4.4 x 10^-4), with 0.50 M HCl, calculate the pH a) after 50.0 mL of 0.50 M has been added b) at the stoichiometric point.
Sunday, March 29, 2009 at 11:41pm by some kid

CHEM HELP...PLEASE!!
A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If 1.00 ml of 12 M HCl is added to this, what will be the resulting pH?
Monday, March 2, 2009 at 11:21am by Kat

Chemistry
see same question how many grams nitric acid HNO3 must be dissolved in 350 ml water to make a solution with pH of 4.5"? or "how many ml of a 4.2M nitric acid solution are required to make 500 ml of solution with pH of 2.9
Sunday, May 12, 2013 at 11:29am by kriti

Chemistry
If we say bottle is 1.5L, then mass water = 1,500 mL x 0.997 g/mL = 1495.5 grams. When frozen to -10, volume = mass/density = 1495.5/0.917 = ?
Tuesday, September 4, 2012 at 2:32pm by DrBob222

Chemistry
The following is given: 20 ml of HCl (2.0 M) added with 5 ml of Na2S2O3 (0.3 M) with 5 ml of H2O S2O3^-2(aq) + 2H^+1 (aq) --> S (s) + SO2 (g) + H2O (l) Calculate the following: a) Reaction rate when 30 mg of sulphur is formed (in 30 ml of solution) after 55 seconds. b) ...
Wednesday, October 20, 2010 at 12:50pm by Stephanie

Buffer
Let's call CH3COOH HA and the acetate ion will be A- millimoles HA = 500 mL x 0.30M = 150. mmoles A- = 500 mL x 0.20M = 100 We will add 93mL x 1.00M = 93 mmoles NaOH. ............HA + OH- ==> A- + H2O initial....150...0.......100...... add..............93...
Monday, April 11, 2011 at 4:54pm by DrBob222

Chemistry
Calculate mass of iron in tablet by spectroscopy? I have to calculate the mass of iron in a tablet..The manufacturers claim it contains 60 mg elemental iron. background info: The tablet was crushed and dissolved in 25ml of 6M Hcl, filtered and added to a 100ml volumetric flask...
Tuesday, February 14, 2012 at 5:36am by Drake

Chemistry
I2(g)+Br2(g)=2IBr(g) I .500 .500 0 C -x -x +2x E .500-x .500-x .84 I know K=[product]/[reactant] but I don't know what to do with the information from there.
Thursday, March 21, 2013 at 2:21pm by Jonah

algebra 1a
16,500 - 14,000 = 2,500 100 (2,500 / 15,500) = ______%
Thursday, January 24, 2013 at 4:43pm by Ms. Sue

chemistry
If 50.0 mL of 0.150 M magnesium bromide is combined with 200 mL of 0.110 M sodium bromide what is the molarity of the bromide ion in the resulting solution? (assume volumes are additive)
Friday, February 8, 2013 at 12:15am by jj

chemistry
Calculate the theoretical yield (g) of precipitate formed when 10.0 mL of 0.50 M magnesium nitrate is added to 5.0 mL of 0.50 M potassium phosphate? [You must first write the balanced chemical equation.] Which reactant is present in excess?
Tuesday, February 26, 2013 at 7:04pm by Joe

chemistry AP
You have to design a buffer based on one of the systems below System 1: HA1 and A1-1 K= 4 E-3 System 2: HA2 and A2-1 K= 5 E-4 System 3: HA3 and A3-1 K= 6 E-5 For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M and that there is no...
Sunday, March 28, 2010 at 1:56am by maya

Chemistry
Calculate the pH of a 50.0 mL solution 0.0120 M ethylaminium chloride (C2H5NH3Cl ) and 0.0360 M ethylamine C2H5NH2. Kb = 4.3 x 10-4 Calculate the pH when 5.0 mL of 0.1 M HI is added. Ignore any changes in the volume
Wednesday, April 17, 2013 at 12:54am by m

chemistry
Determine the melting point of an aqueous solution containing 115 mg of saccharin (C7H5O3NS)added to 1.00 mL of water (density of water=1.00 g/mL, Kt=1.86 C/m)
Tuesday, September 11, 2012 at 8:33pm by Brunette

Chemistry
If a 11.0 mL sample of vinegar (aqueous acetic acid ) requires 19.0 mL of 0.500 M NaOH to reach the endpoint, what is the original molarity of the acetic acid solution?
Monday, October 29, 2012 at 5:21pm by Erin

Chemistry
If a gas has a volume of 500 ml and pressure of 1.5 atm, what will the pressure be if the volume is reduced to 250 ml?
Friday, May 18, 2012 at 11:47am by Bob

chemistry please help!!
A 0.2mol/L solution of KMnO4 has been added to 10 ml of 0.5mol/L acidified FeSO4. write the balance equation of the reacttion then calculate the volume of the oxidizing solution that should be added to oxidize all the Fe^2+ ions. please help and thank you!!
Friday, January 7, 2011 at 11:02am by fadi

Chem
In a titration process it takes 22.00 mL of nitric acid to neutralize 16.70 mL of 0.200 M calcium hydroxide solution. what is the balanced equation and what is the molarity of the acid. please explain
Wednesday, June 13, 2012 at 11:29pm by Piper

Chemistry
5.00mL of .00500 M ferric nitrate is added to 5.00 Ml of nitric acid and 10.0 Ml of .00250 M thiocyanate solution. Calculate the initial FE^3+ concentration before reaction. I know F3^3+=Cfe-[FESCN^2+] after that I have no idea what to do. Help please?? =-(
Sunday, February 21, 2010 at 5:02pm by Koo

CHEMISTRY
I'm struggling with this homework question...i have no idea how to set this up. We start with a 33.50 mL aliquot of acetic acid and titrate it with 0.215 M of NaOH. Find the pH at: 21.7 ML added the equivalence point i don't understand how this works. please help, ...
Sunday, May 18, 2008 at 8:24pm by Charlie

Biology
In a lab experiment, we experimented with 1% glucose solution and Sorenson's solution to determine pH levels and whatnot; the other part of the lab was to determine which one, if either, was a buffering solution. According to the notes my instructor gave us, a buffers are ...
Monday, January 28, 2013 at 1:10pm by Emily

chemistry
If 40 mL of a 6 {\rm M} \;{\rm NaOH} solution is diluted to a final volume of 200 mL, what is the resulting concentration of the solution?
Monday, December 6, 2010 at 5:17pm by warla

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