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September 16, 2014

Search: NaOH

Number of results: 2,869

chem help w/ Lab
Weight of the mustard package Sample: 3.02 (g) Weight of the mustard package Solution: 33.3 (g) Trial #1 Trial #2 Trial #3 Weight of Mustard Package Solution Delivered (g) : 1.09 .948 .909 Weight of NaOH Solution Delivered (g) : .354 .304 .269 Concentration of NaOH : 7.48e-3 (...
October 17, 2012 by Den

Chemistry
The pH of a weak monoprotic acid, HA, is 4.55. It took 39.22 ml of 0.2334 M NaOH to titrate 25.00 ml of the acid. a. Write an equation for the above reaction. b. Calculate the molarity of the weak acid c. Write the equilibrium equation. Construct a table showing initial ...
April 9, 2011 by Cassie

Chemistry
A chemical plant uses electrical energy to decompose aqueous solutions of NaCl to give Cl2,H2, and NaOH: 2NaCl(aq)+2H2O(l)-->2NaOH(aq)+H2(g)+Cl2(g) If the plant produces 1.110^6 kg (1100 metric tons) of daily, estimate the quantities of H2 produced. If the plant produces 1...
September 27, 2011 by Brennan

Science
Given: Concentration of acetic acid 0.1M and 30mL used. Concentration of hydrocholoric acid 0.1M and 15mL used. Concentration of sodium hydroxide 0.1M and 5mL used. I need to calculate the pH before any NaOH is added and after the NaOH is added. I think i am suppose to use the...
April 1, 2009 by Sunshine

Chemistry
Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. (a) 100.0 mL of 0.14 M HC7H5O2 (Ka= 6.4 multiplied by 10-5) titrated by 0.14 M NaOH halfway point equivalence point (b) 100.0 mL of 0.29 M C2H5NH2 (Kb = 5.6 multiplied by ...
June 1, 2012 by Andrew

Chemistry
A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was titrated with a .135 M NaOH solution. After the addition of 10.6mL of base, a pH of 5.65 was recorded. The equivalence point was reached after the ...
May 9, 2007 by Sara

Chemistry
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July 9, 2007 by Jared

For Dr.Bob222 (chem work)
What is the pH of a solution of 120 ml 0.15M acetic acid to which we add 30mL 0.2M NaOH? CAN YOU CHECK MY WORK PLEASE? 0.15 mol/L * 0.12 L = 0.018 mol acetic acid 0.2 mol/L * 0.03 L = 0.006 mol NaOH 0.018 - 0.006 = 0.012 mol of acetic acid in excess pH = pKa + log (acid/base) ...
August 27, 2007 by Gulzaman

Chemistry
You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 5.00 using only pure acetic acid, 3.00 M NaOH, and water. Calculate the quantities needed for each of the following steps in the buffer preparation. 1. Add acetic acid to ~400 mL of water in a 500 mL beaker. ...
September 28, 2012 by Kw1h

Chemistry
25 ml of cloudy ammonia solution is added to a 250 ml Erlenmeyer flask. 50 ml of .1 M HCl is then immediately added to the flask, which reacted with the ammonia in the solution. Next, the solution was titrated with .025 M NaOH to neutralize the excess HCl that was not ...
February 2, 2014 by Anonymous

chemistry
hello, I have done a acid & base titration lab, with 0.1M vinegar (with unknown %tage acid) and 0.1 NaOH...I think the result came out ok, in avg, 25.21mL of NaOH have titrated w/ 30.0mL unknown %tage acid of vinegar. all I am given is Density of vinegar= 1.00g/mL and ...
May 28, 2008 by J Kang

chem
I have to balance an equation and I had to make the equation from an experiment we did. So far, my equation looks like this and I know what I have is correct: Cu(NO3)2+H20+NaOH----->Cu(OH)2 I think I probably need an N or a Na on the right side. What do you think? You don't...
March 5, 2007 by Abby

Chemistry
Consider the following reaction: PbCl2 + 2 NaOH -> Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+ ions, Cl− ions ...
April 5, 2010 by Cher

333
CoCl2+NaOH =
November 21, 2007 by Anonymous

scince
ch3coona+naoh
November 5, 2009 by janak

scince
ch3coona+naoh
November 5, 2009 by janak

Chemistry
What is the pH of 50.0 M HF and 25.0mL of 1.0 M NaOH?
May 4, 2010 by Chris

chemistry
how many grams are in 49.0 mL of NaOH
March 13, 2012 by jasmine

Chemistry
What is the pH of a solution of NaOH 10^-12 M?
April 8, 2014 by Erin

chemistry
preparation of N/10 NaoH
May 12, 2014 by rakesh kuamr

Chemistry urgent for my LAB today (22.09.11)
0.250g of phthalic acid is dissolved in 40.00cm^3 of 0.100 mol dm^-3 NaOH. It requires 11.80 cubic centimeters of 0.100 mol\dm^-3 HCL fo neutralisation( to phenolphthalein) The mole ratio in which phthalic acid reacts with sodium hydroxide ihn 1:2 (a) Calculate the moles of ...
September 21, 2011 by Petty

Chemistry 3
How is it possible for me to tell which of these solutes will produce an acidic solution when dissolved in water? LiOH CH3CO2K H2SO3 KOH NaOH NH4NO3 NaOH NaOH can't be the only one... Molecules that produce OH^- when dissolved in water will be basic. Examples:LiOH, KOH, NaOH, ...
May 24, 2007 by Lindsay

Chemistry
Titration was used to determine the molarity of acetic acid in vinegar. A primary standard solution of KHP was used to standardize the NaOH. 1. When performing this experiment, impure KHP was used to standardize the NaOH solution. If the impurity is neither acidic or basic, ...
March 28, 2014 by Sandy

Chemistry
Even if you can help answer one that would be a great help! 1. How many liters of NO(g) are produced when 0.85L of 2.00M HNO3 solution is added to 216g according to the equation. Which reactant is the limiting reactant? 3 Ag + 4 HNO3 -> 3 AgNO3 + NO + 2 H2O3 2. Calculate ...
October 20, 2013 by P.

chemistry
analysis of a mixture of carbonate and bicarbonate: I did an experiment where 2.306g of unknown was diluted with distilled water to 250ml. Then 3 25mL samples of this unknown were titrated with .0663 M HCl and end point volumes were: 41.12mL, 41.00mL and 40.99mL. Then 3 more ...
September 25, 2013 by martini

Chemistry
Calculate the enthalpy change of formation for the following reactions using Hess's law, and the enthalpies of formation given in Figure 4: b) MgO +2HCl --> MgCl2 +H2O c)NaOH+ HCl -->NaCl +H20 Figure4: the given enthalpies of formation compound values are: Mg(OH)2 is ...
January 30, 2014 by BOB

Chemistry -help
To determine the sodium carbonate content & total alkali in NaOH, the following steps were performed:- 1) 2.0g of NaOH was dissolved in 80ml of CO2 free water. 2) 3 drops of phenolphthalein indicator were added and the solution was titrated with 1M HCl. Colour changed from ...
September 18, 2010 by anne

Chemistry
Calculate the pH after 0.016 mole of NaOH is added to 1.05 L of a solution consisting of 0.138 M HONH2 and 0.127 M HONH3Cl, and calculate the pH after 0.016 mole of HCl is added to 1.05 L of the same solution of HONH2 and HONH3Cl. (Assume that all solutions are at 25C.) 0.016...
March 13, 2013 by Margaret

Chem
NaOH (aq) + Zn (solid) reaction
November 12, 2007 by John

chemistry
why NaOH must be standardized?
March 5, 2010 by zukhruf

chemistry
NaOH+CO(NH2)2----> what's the products??
June 25, 2010 by renee

chemistry
30.0 mL of 1.50 M NaOH is diluted to 50.0 mL. What is the resulting pH?
February 28, 2011 by Anonymous

Chemistry
ph balance of NaOH + H2O
March 7, 2011 by Kel

Chemistry
How can i prepare a solution of 12 g 50% (w/v) NaOH?
June 17, 2011 by PAnos

chemistry 111
How many moles are in 6.35 g of NaOH
November 2, 2011 by Anonymous

chemistry
How many moles NaOH in 66.4 mL of 0.1 M solution?
December 8, 2011 by Anonymous

chemistry
How do you calculate molarity of NaOH?
June 18, 2012 by Mitsy

Chemistry
Calculate the pH of 30.0 mL of 0.025 M NaOH
November 27, 2012 by Jen

Chemistry
Calculate the pH of 30.0 mL of 0.025 M NaOH
November 27, 2012 by Jen

Chemistry
How many mL of 0.49 M HCl will neutralize 42 mL of 1.48 M NaOH?
April 20, 2014 by Eric

chemistry
what is the weight in kg of 3*10 22 molecules of NaOH
June 5, 2014 by tanvir

chemistry
1)when benzoic acid and quinine is dissolved in CH2Cl2 and added 2M NaOH, what is the organic layer and what is the aqueous layer? a)and by adding another 2M NaoH to the organic layer, what is the new aqueous layer and organic layer? b)from (1), if we add CH2Cl2 to the aqueous...
March 31, 2009 by Nancy

chemistry
when pressure decreases what happens with the boiling point, it decreases, increases or stays the same? I read the book (the example used is water) were it says that if vapor pressure is less than the pressure pushing down on the surface the bubbles formed collapse; but when ...
May 23, 2007 by Fabiola

Chemistry, pH, Buffers
Please help!! Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final acid solution 3.49 Show me how do I calculate the Ka of the unknown acid and the ...
April 2, 2012 by Krina

Chemistry
I need to predict the acid/base reactions of sodium carbonate with HCl, CH3COOH, NH3, and NaOH. I'm stuck, when I'm writing out the ions to find the strongest acid and base, does the NaHCO3 become Na and HCO3, or N, H, and CO3? Also, would these be polyproptic? NaHCO3 ==> ...
March 19, 2007 by Lyn

Chemistry-need help ASAP
15 ml of 3.0 M NaOH are added to the following: 500.0 ml of pure water 500.0 ml of 0.1 M formic acid 500.0 ml of 0.1 M formate of potassium 500.0 ml of a solution containing 0.1 M formic acid and 0.1 M formate of potassium. Calculate the difference of pH resulting from the ...
April 14, 2014 by Sam

chem
Zn^2+(aq) + 2OH^-(aq) ----> Zn(OH)2(s) a) how the addition of HCl affects the equilibrium? my answer is it will shift to the right b) how the addition of a small amount of NaOh affects the equilibrium?my answer is it will shift to the left c) how the addition of a large ...
November 26, 2012 by tracy

chemistry
I need to find a balanced chemical equation for the reaction that occurs when sodium cyanide dissolves in water. So far I have got NaCN + H2O = HCN +NaOH, does not seem balanced to me, any help please. Can't you tell if it is balanced or not? It's a matter of counting the ...
February 9, 2007 by Sam

Chemistry
Procedure #1 PLEASE NOTE: Titration requires several steps in order to obtain exact results. The procedures described in this lab assume that you have already done the TITRATION TUTORIAL and are familiar with the technique. 1. Take a clean Erlenmeyer flask from the Glassware ...
August 11, 2010 by annonomus

chemistry
hi, I am trying to find the solubility of Sodium Acetate by using 0.100 mol Hydroxide(base) and 0.837 mol acetic acid( vinegar). The theoretical solubility of sodium acetate is 82.3g/100ml at 25C. Doing calculations we would want NAOH concentration of 10.47mol/l to react with ...
June 3, 2008 by john

chemistry
I have two questions regarding enthalpy of reactions: 1.) Care must be taken when dissolving NaOH pellets in water because the temp. can rise dramatically. Taking NaOH as system, what can be deduced about the signs of the entropy of system and surroundings? Am I correct in ...
May 2, 2014 by Rebecca

CHEMISTRY
ANTACID TABLET OF WEIGHT 1.3183G WAS DISSOLVED IN 75 MLOF CONC. HCl OF 0.1807M IS TITRATED WITH 20.36ML OF CONC. NaOH OF 0.1481M . FIND MILIMOLES OF HCl ADDED, FIND MILIMOLES OF NaOH USED IN TITRATION, FIND MILIMOLES OF HCl THAT DID NOT REACT WITH ANTACID, FIND MILIMOLES OF ...
October 16, 2011 by Anonymous

chemistry
How do I make a 6M NaOH solution? (25mL)
January 19, 2008 by Alex

Chem
H2C4H4O4 + NaOH how do you balance this titration?
April 21, 2008 by Bryan

Chemistry
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not?
February 4, 2009 by Amy

science
what is the answer for the equation NaOh+HCl?
October 21, 2009 by me

chemistry
how to make 750ml of 1.5 m solution of naoh
March 4, 2010 by Anonymous

chemistry
If 30.0 mL of 4.8 10-2 M HBr is added to 21.5 mL of 3.6 10-2 M NaOH, what is the pH of the solution?
April 27, 2010 by Sue

chemistry
what is the chemical equation for HCL and NaOH?
November 22, 2010 by Anonymous

Chemistry
What is the pH when 25 mL of .20 M CH3COOH has been titrated with 35 mL of .10 M NaOH?
November 29, 2010 by Louis

chemistry
what is the pH of an .200 M aqueous solution of NaOH?
November 30, 2010 by Anna

chemistry
convert 4.37 moles of NaOH to grams.
January 27, 2011 by Amanda

chemistry
How many grams of NaOH are there in 2.5L of a 0.343M solution?
February 9, 2011 by twynna

chemistry
How many grams of NaOH are there in 2.5L of a 0.343M solution?
February 13, 2011 by twynna

chemistry
How many grams of NaOH are there in 2.5L of a 0.343 M solution?
February 20, 2011 by twynna

chemistry
Calculate the pH in a 0.00500 solution of NaOH.
February 21, 2011 by JC

CHEM101
Do you have to know accurately the concentration of NaOH?
February 25, 2011 by Mahlatse

chemistry
Mass of "KHP" to neutralize 18 mL of 0.20 M NaOH?
February 25, 2011 by sallay

chemistry
How many grams of NaOH are there in 2.5L of a 0.343M solution?
March 12, 2011 by n/a

Chemistry
What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH
March 29, 2011 by Omar

Chemistry
What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH
March 29, 2011 by Omar

CHEMISTRY
What is the concentration in normality of NAOH (19.5CM3)
June 28, 2011 by S.KALEKYE

chemistry
calculate the ph of 20 ml of .1M NaOH to 40 ml of acetic acid
March 29, 2012 by mark

chemistry
calculate the ph of 20 ml of .1M NaOH to 40 ml of acetic acid
March 29, 2012 by mark

chemistry
calculate the ph of 20 ml of .1M NaOH to 40 ml of acetic acid
March 29, 2012 by mark

chemistry
calculate the ph of 20 ml of .1M NaOH to 40 ml of acetic acid
March 29, 2012 by mark

Chemistry
How do I prepare 30 mL of NaOH by dissolving it in water?
October 9, 2013 by AA

chemistry
0.05naoh in 2and half ml naoh?
March 10, 2014 by kapil

chemistry
what will be the pH of a solution NaOH with the concentration 2,2.10mol
May 28, 2014 by bryan

Chemistry
Can someone please help me answer these questions? Is additional information other than what is given needed to solve? Thanks in advance. 1) Calculate the PH of a buffer containing 0.100 M propanoic acid, HC3H5O2 and .100 M NaC3H502 after the following have been added. Ka for ...
December 13, 2013 by Charles

science
Is this balanced correctly NaOH + H2SO4 = Na2SO4 + H2O? In this equation, Sodium (Na) and Hydrogen (H) atoms are not balanced. There are 2 atoms of Sodium (Na) on Right Hand Side, so we can multiply NaOH with 2 on Left Hand Side. This balances the Sodium (Na) atoms. Now, ...
July 11, 2014 by duane

Chem
Write the equation for dissocation of acetic acid in water: My Answer: CH2COOH + H2O <=> H3O+ + CH3COO- Equation for hydrolysis of acetate anion in water: My Answer: CH3COO- + H2O <=> CH3COOH + OH- Now, using the above formulas, I have to show how a buffer works ...
March 21, 2007 by Marisol

Chemistry, Buffers, pH
Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final acid solution 3.49 Show...
September 26, 2008 by janet

Chemistry
7.0 ml of 6.0 M NaOH are diluted with water to a volume of 400 ml. You are asked to find the molarity of the resulting solution. The total number of moles of NaOH is not changed on dilution. Calulate the molarity. Work: (6)(.007)=(x)(.4) x=.105M Thanks for showing your work. I...
April 19, 2007 by Anonymous

chemistry
whats the pH if 25.0 ml of 2.0 M NaOH is added to 1.00 L of pure water?
November 1, 2007 by Niraj

Chemistry
What molarity of NaOH would produce a pH of 10? And how do you calculate it?
April 16, 2008 by Ashley

science
What is the pH of the solution created by combining 11.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)?
May 5, 2008 by sara

chdem
What is the pH of the solution created by combining 2.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq
August 20, 2008 by Anonymous

Chemistry
Calculate the pH of a solution that is 2.00 M HF, 1.00 M NaOH, and 0.704 M NaF. (Ka = 7.2 E -4)
December 17, 2008 by Schanee

O-CHEM
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? please help... thanks
February 3, 2009 by Nina

Chemistry
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? please help... thanks
February 3, 2009 by Nina

Organic Chemistry
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not?
February 4, 2009 by Amy

chemistry
What is the pH of the solution created by combining 0.80 mL of the 0.10 M NaOH(aq)with 8.00 mL of the 0.10 M HC2H3O2(aq)?
July 13, 2009 by Anonymous

science
Calculate the concentration M if you have a 0.03mol of NaOH in 22 mL
October 12, 2009 by lj

Chemistry
What is the normality of 10 ml of an acid that took 25 ml of 0.25 N NaOH to reach pH 7?
February 17, 2010 by David

chem
how many ml of 0.15 m naoh solution are required to neutralize 35.00 ml of 0.22 m hcl
April 23, 2010 by Anonymous

chemistry
What is the pH of the solution created by combining 12.00 mL of the 0.10 M NaOH with 8.00 mL of the 0.10 M HC2H3O2?
April 24, 2010 by need help please!!!

Chemistry
How much 0.10 M NaOH (in mL) is required to neutralize 8.00 mL of the 0.10 M HC2H3O2?
May 2, 2010 by John

chemistry
What is the pH of the solution created by combining 12.90 mL of the 0.10 M NaOH with 8.00 mL of the 0.10 M HC2H3O2?
May 3, 2010 by jc

Chemistry
Is 20.0 mL of 1.0M CH3COOH and 10.0mL of 1.0 M NaOH a buffer solution of 3?
May 4, 2010 by Anne

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