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April 25, 2015

Search: prepare 250.0mL of a 0.500M solution of NaCl

Number of results: 24,129

College Chemistry (DrBob222)
You have 120.0 mL of a 0.245 M solution of NaCl in an open beaker. After several days, you test the solution and find that it now has a concentration of 0.348 M. How much water must have evaporated from the beaker given the new concentration?
March 25, 2014 by Anonymous

Chemistry
You are asked to prepare a pH=4.00 buffer starting from 1.50 L of 0.0200 \; M solution of benzoic acid C_6 H_5COOH and an excess of sodium benzoate C_ H_5 COONa. How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that ...
November 22, 2012 by Josh G.

chemistry
If you add 50 g of sylvite in 100 ml of water at 60 ° C, the resulting solution will she unsaturated, saturated or supersaturated? You prepare a solution and you add 50 g of potassium nitrate to 100 ml of water at 50 ° C. What type of solution are you prepared? Ammonia is a ...
February 8, 2011 by Kay

chemistry
Choices: True,False. Select all that are True. The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water. One cannot prepare a buffer from a strong acid and its conjugated base, ...
November 26, 2011 by paul

Chemistry
A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35 g of the compound in water to form 0.250 L solution. The resulting solution has an osmotic pressure of 0.605 atm at 25 Celsius. Assuming that the organic compound is a nonelectrolyte...
February 6, 2012 by Jeremy

Chemistry
Calculate the heat of solution of LiOH if addition of 25.0g of LiOH causes the temperature of 120.0ml of water to rise from 20.0 celcius to 29.0 celcius.
January 25, 2013 by Aditi

chemistry
determine the mass of a 50.0mL sample of your salt solution. Report the mass as a number and use all lower case letters to spell out the word(s) in the unit(s). y = 1.049 x + 0.096
May 28, 2012 by Elias

Chemistry 104
A student has 10.0mL of phosphate solution that contains 1.0M PO4{3-}.The Student reacts this with excess ammonium & magnesium under basic conditions to produce 2.2034g of struvite. Calculate the % yield.
October 2, 2014 by Samantha

chemistry
how would you prepare a 500 mL of 0.020M KMnO4 solution?
October 24, 2009 by tumcee

chemistry
how many grams of 5%NaNO3 will be required to prepare 250ml solution
August 7, 2010 by amruta

10THGRADE CHEMISTRY
HOW WOULD YOU PREPARE ML OF A 0.250M SOLUTION OF Ca(NO3)2?
February 8, 2011 by PORSHA

chemistry
how will u prepare 500g of aqueos solution which is 10% NaOH by mass?(%W/W)
March 4, 2011 by yui

chemistry
what is the mass of CuS04 needed to prepare a 125ml solution of 3.5M?
March 7, 2011 by kjkajkjujo

chemistry
how to prepare 280 ml of a 27% v/v solution of ethanol, C2H6O in water
April 10, 2011 by lisette

Chemistry 106
How would you prepare 1.00 liter of a 0.18 M solution of NaOh?
April 11, 2011 by Lexi

chemistry
describe a prepare a 0.25 L.0.5 mol standart solution of NaoH
August 6, 2012 by bihah bi

Chemistry
What mass of KBr is required to prepare 8.oo L of .400 M solution?
September 10, 2012 by Nicole

Science
How do you prepare 500mL of a 2.5M solution of NaOH from the solid compound?
December 9, 2012 by Cassie

chemistry
how many grams of CuSO4.5H2O is needed to prepare 0.01 M solution?
March 4, 2015 by Anonymous

science
How many moles of li2so4 is required to prepare 300ml of a 0.5 m solution
March 31, 2015 by ernstcia

chemistry-last one i swear
calculate the normality of Ca(OH)2 in a solution made by dissolving 4.75 g Ca(OH)2 in enough water to a make 250 mL of solution
December 11, 2007 by Hillary

chemistry
A beaker contains 250.0 mL of a 1.00 M HCl solution. How many moles of the acid would remain in the solution after 0.199 moles of HCl are neutralized?
June 13, 2010 by Jerry

Chemistry
Find the pH of a solution prepared by taking a 50.0 mL aliquot of a solution prepared by dissolving 12.25g of NaOH and 250.0 mL of water and diluting that aliquot to 1.00L?
January 20, 2011 by Audrey

high school chem
How many grams of a stock solution that is 92.5 percent h2s04 by mass would be needed to make 250 grams of a 35% by mass solution?
March 9, 2011 by Kayla

Chemistry
How many milliliters of a 3.85 M solution of Fe2+ are needed to titrate 250.0 mL of a 0.125 M Cro4 2- solution? H + CrO4 2- + Fe2+ yields to Fe3+ + Cr2O3 + H2) (not balanced)
November 23, 2011 by Jane

Physical Science
24. What happens when a solution of nitric acid (HNO3) is added to a solution of potassium hydroxide (KOH)? What are the products? 25. Which of the following compounds can react with H2SO4 to form a salt: NaCl, Ca(OH)2, HF, AlCl3, H2O, Mg(OH)2? Name the salt(s) that would form...
October 15, 2013 by Alexandra

Chemistry
If the same solute is dissolved in two different solvents to the same concentration and the same temperature, the osmotic pressure ____ My answer & reason: solution A has a smaller molecular weight and therefore, a larger Molarity and higher osmotic pressure (pi=iMRT) ...
February 25, 2009 by Anonymous

chemistry
how do i do this \? a 4.0mg/dl standard solution is needed. To prepare 100ml of the working standard. How much stock standard of a 1mg/ml (100mg/dl) solution is needed. i dont understand this conceptually / thanks
January 21, 2010 by Dan_9

College Chemistry
Calculate the pH of a solution prepared by mixing 250.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 38.7g of an aqueous solution that is 1.50% NaOH by mass (density= 1.02g/mL).
March 23, 2011 by Anonymous

Chemistry
What is the concentration in mol/L of a CuSO4 solution containg 1.0 mole of CuSO4 in 250 mL of Solution? I would like to know how to calculate the answer and be giving the correct answer please.
November 19, 2012 by Hannah

chemistry
Benzoic Acid (HC6H5OO, 122.0 g/mol) has a Ka = 6.3 x 10-5. What is the pH of a solution that has 3.050 g of benzoic acid in enough water to make a 0.250 L solution?
March 31, 2012 by Anonymous

analytical chemistry
A solution containing 0.40 M B (a weak base) and 0.20 M BH+ (the salt of the weak base) has a pH = 10.30. What is the pH after 25 mmol of HCl is added to 250 mL of this solution?
May 22, 2014 by axy

chemistry
if 5.105 gm of KHP (Mwt=204.2)was dissolved in 250 ml,10.70 ml of this solution of KHP was titrated with 10.0 ml of NaOH . Calculate the concentration of NaOH solution
September 24, 2014 by bibi

College Gen. Chemistry - Science
You have 120.0 mL of a 0.245 M solution of NaCl in an open beaker. After several days, you test the solution and find that it now has a concentration of 0.348 M. How much water must have evaporated from the beaker given the new concentration?
March 25, 2014 by Anonymous

chem
An aspirin tablet weighing 0.650 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ...
April 20, 2008 by un

chem
An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ...
April 18, 2011 by CHEMCHEM

Analytical Chem
The following electrochemical cell can be used to calculate the formation constant Kf for a metal and EDTA. The cell has a voltage of -0.262V. The right half cell contains a metal (M^2+) with a standard reduction potential of -0.236V. Calculate the Kf for the metal EDTA ...
October 15, 2014 by Anonymous

Chemistry 2
In a study designed to prepare new gasoline resistant coatings, a polymer chemist dissolves 6.053g of poly in enough water to make 100.0 mL of solution. At 25C, the osmotic pressure of this solution is 0.272 atm. What is the molar mass of the polymer sample?
March 26, 2010 by Mike

chemm
When a reaction mixture with a total volume of 1180 mL that is 0.0110 M aqueous NaCl was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0116 M aqueous Ca2+ was required? 3 CaCl2(aq) + 2 Na3PO4(aq) → Ca3(PO4)2(s) + 6 NaCl(aq) Molar Mass (g...
December 7, 2010 by ann

Cost Accounting
PLEASE, PLEASE, can you give me the step to calculate these: 1.Prepare the beginning inventory for the first quarter 2.Prepare the budgeted beginning inventory for the second - fourth quarters 3.Prepare the budgeted production for each quarter 4.Prepare the budgeted production...
November 5, 2009 by Jessi

college princ. of accounting II
Prepare the adjusting entries at March 31, assuming that adjusting entries are made quarterly. (Round all answers to 0 decimal places.) The equipment depreciates at $250 per month.
January 19, 2009 by Britni

Chemistry
What would the osmotic pressure be for an aqueous solution that contained the following, .4 M NaCl, .3 M glucose and .2 M CaCl2? Assume temp is 25 C.
January 16, 2008 by Anonymous

Chemistry
What can you conclude about the relationship between colligative properties and the type of ions in solution from the 1.0m HCl(aq) and 1.0m NaCl(aq) solutions?
February 16, 2010 by Laverne

chemistry
what volume of physiological saline solution (0.90% by weight NaCl, in water) would give you a gram of salt when evaporated?
January 18, 2011 by jemmie

Chemistry
I would like to have 1 mole of Cl- ions in 500ml of water, how many grams of NaCl do I weigh out for this solution?
January 22, 2011 by Lindsey

chem
is a solution containing 35g of NaCl per 100g of water at 25 degrees Celsius, saturated, unsaturated, or supersaturated
March 1, 2012 by nakisha

sliva
a solution is made by dissolving 3.95g of NaCl in 78.2 mL what is the concentration of sodium chloride in units of weight/volume percent
April 16, 2012 by amber

science
a solution of sodium chloride in water has a vapor pressure of 19.5 at 25C what is the mole fraction of NaCl solute particles
September 17, 2012 by morgan

chemistry
What is the mass of dry NaCl sample should be taken for 100 cm3 of 0.5 mol/dm3 aqueous solution?
November 15, 2012 by michelle

chemistry
 Which 0.10M solution below has the lowest pH? a) NaCl          b) KCN          c) LiF          d)  RbClO     e)  all have the same pH​
March 26, 2013 by Anonymous

ecc
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
April 15, 2013 by george

ecc
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
April 15, 2013 by george

ecc
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
April 15, 2013 by george

Chemistry: Molarity
4.82 mL of a 0.262 M NaOH solution reacts completly with 4.79 mL of HCl solution according to the balanced chemical reaction shown below: HCl (aq) + NaOH (aq) -> NaCl*aq) + H2O (I) What is the molarity of the HCl solution? 4.82 x (1L/1000 mL) = .00482L 4.79 x (1L/1000 mL...
March 1, 2009 by Bob

Chemistry
You are a lab technician and must create 250 ml of a 17% salt solution. You have available three stock solutions. You have a one liter container of a 5% salt, a 500 ml container of a 28% salt solution, and a 400 ml container of a 40% salt solution. Discuss and explain the ...
March 5, 2012 by Fatih

math
Please show all of your work in the space below. Please present and organized and complete solution. A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m square. Draw two possible gardens. Determine the dimensions of ...
November 22, 2013 by jhon

chemistry
A 0.094 g of CuSO4*5H20is dissolved and diluted to the mark in a 500.0-mL volumetric flask. A 2.00-mL sample of this solution is transferred to a second 500.0-mL volumetric flask and diluted. What is the molarity of CuSO4 in the final solution? To prepare the solution directly...
August 29, 2011 by Anonymous

college chemistry
for my lab i used 2.0mL of NaOH solution and it doesnt have a density in (g/mL)... is there still a way to calculate the moles to it? unless there is a density to NaOH
March 19, 2013 by Anonymous

chemistry
describe how to prepare a .50 m solution of lead nitrate using only 100.00 mls of water. aslo discribe how to prepare a .50m sloution of sodium iodide using only 100.00 mls of water. explain the differences that exist between these two solutions. OK i have answers for both 1....
February 15, 2012 by kate

chemistry
Pb(NO3)2 6.0mL 0.5 mol NaI 12.0mL 0.5 mol What is the mole ratio between Pb(NO3)2 and NaI?
March 10, 2010 by BT

chemistry
A 10.0 mL sample of 3.00 M KOH(aq) is transferred to a 250.0 ml volumetric flask and diluted to the mark. It was found that 38.5 ml of this diluted solution was needed to react the stoichimetric point in a titration of 10.0 mL of a phosphoric acid, H3PO4, solution. The ...
June 20, 2009 by dan

Chemistry
Let’s assume you have 250 ml of a 1.3M KOH solution and you want to neutralize it with the acid HBr. It takes 350 ml of the HBr solution to do so. What must have been the molarity of the HBr solution? HBr(aq) + KOH(aq) => KBr(aq) + H2O(l) The stoichiometry is already ...
November 29, 2014 by Chris

Chemistry
Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe how you would ...
October 15, 2010 by Dexter

Chemistry
Suppose you are going to add 450 mL of a 0.10 mol/L hydrochloric acid solution to 250 mL of a 0.2 mol/L sodium hydroxide solution. a)Which one is the limiting reactant? b)What is the theoretical yield of sodium chloride?
December 10, 2011 by Maame

chemistry
An experiment in your laboratory requires 500 mL of a .0200 M solution of Na2CO3. You are given solid Na2CO3, distilled water and a 500 mL volumetric flask Describe how to prepare the required solution showing all calculations and describing each step appropriately.
November 15, 2011 by Jennifer

chemistry
how many grams of solid NaOH are required to prepare 200 ml of a .05 M solution?
February 5, 2009 by ash

Chemistry
What weight of NaOH would be required to prepare 3000ml of a 2.5M solution?
April 21, 2009 by Jessi

Chemistry
How many grams of CuSo4 x 5h20 to prepare 100 mL of a .10M solution?
March 29, 2010 by John

chemistry
what you would do to prepare 100.0g of a 3.5% solution of ammonium sulfate in water
May 13, 2010 by Anonymous

chemistry
What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.53?
November 24, 2010 by AMANDIP

chemistry
What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.68?
November 28, 2010 by justin

chemistry
how Many grams of copper(11) acetate monohydrate will you ned to prepare 10 mL of a 0.01 M solution?
December 1, 2010 by ken

Chemistry
How much of NaOH (in grams) is needed to prepare 546 mL of solution with a pH of 10.00 ?
February 15, 2011 by Sara

Chemistry
How much of NaOH (in grams) is needed to prepare 546 mL of solution with a pH of 10.00 ?
February 16, 2011 by Sara

chemistry
How many grams of solid KOH are needed to prepare 100.mL of a 1.7 M solution?
February 21, 2011 by Kelli

chemistry
whatmass of (NH4)3SO4 is required to prepare 500cm3 of m/4 solution
March 30, 2011 by kim

chemistry
How many grams of Al(NO3)3 are needed to prepare 25.0 mL of a 0.750 M aqueous solution.
September 21, 2011 by joan

chemistry
how to prepare 1M,50ml buffer solution by taking Na2HPO4 and NaH2PO4.
November 16, 2011 by umesh

Chemistry
What mass of KOH is necessary to prepare 799.2 mL of a solution having a pH = 11.65?
November 23, 2011 by Kaleen

Chemistry
What mass of KH2PO4 is needed to prepare 500.0 mL of a 0.067M solution?
February 9, 2012 by John

Chemistry
How do you prepare 2% Cu S04? How does this solution differ from 2M CuS04? I am stumped. Thank you. Deb
April 30, 2012 by Debbie

chemistry
calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution
November 14, 2012 by elissa

chemistry
How would you prepare a supersaturated solution of CuSo4 in 100ml of water
November 24, 2012 by Jen

chemistry
How many grams of NH2OH are needed to prepare 250mL of a solution with a pH of 9.56? kb=6.6x10^-9
December 31, 2012 by sabryna

lab
How much 38%Hcl will be used to prepare N/3.05 solution in 2litre water.
January 18, 2013 by abc

Analytical chemisty
How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?
February 2, 2013 by Anonymous

Chemistry
How many grams of CuSO4 * 5H2O are needed to prepare 100mL of a 0.10 M solution ?
April 4, 2013 by Jade

chemistry
the amount of K2Cr2O7 required to prepare 100ml of its 0.05N solution
April 25, 2013 by saba anjum

chem
How would you prepare 100 mL of a 0.01N sulfuric acid solution?
March 7, 2014 by Anonymous

chemistry
what mass of water is necessary to prepare 150.0g of 1.30% saline solution
December 12, 2014 by Anonymous

Chemistry(Please help,thank you)
I have to find the calculation of Van't Hoff factor "i" for NaCl and sucrose. The directions say to use the equation delta Tf = kf X m X i and to use Kf for water = -1.86C/m So I have the molality of NaCl and sucrose as well as delta Tf so for NaCl I plugged the numbers into ...
February 20, 2012 by Hannah

Chemistry 108
Calculate the freezing point and boiling point of a solution containing 14.8g of naphthalene (C10H8) in 120.0mL of benzene. Benzene has a density of 0.877 g/cm3.
June 27, 2014 by Bama

Chemistry
To what volume should you dilute 124mL of an 8.10M CuCl2 solution so that 49.0mL of the diluted solution contains 4.81g CuCl2? Molar Mass of CuCl2= 134.45 g/mol Convert: 4.81g * (1mol/ 13.45g CuCl2)= 0.0358mol CuCl2 [CuCl2]= M= mol/L= (0.0358mol/ 49ml) * (1000mL/1L)= 0.7306M ...
February 21, 2015 by Nyle

chemistry
When a 28.8mL of .500M H2SO4 is added to 28.8mL of 1.00M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, teh temperature rises to 30.17 degrees Celsius. Calculate the ^H(change in enthalpy)of this reaction. (assume total volume is the sum of individual volumes and ...
October 12, 2008 by Kelsie

Chemistry
hellppp please i have a test on this on mondayy im so screwed A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C is observed to be 0.4010 atm. What is the mass percent of ...
November 29, 2008 by yvonne

CHEM
A student used 10 mL water instead of 30 mL for extraction of salt from mixture. How may this change the percentage of NaCl extracted? My book says: % NaCl= (grams of NaCl / total grams of mixture) x 100 What I don't get is if it does change the percentage, why? It says the ...
September 4, 2012 by Daisy

chemistry
A vitamin C tablet containing 250 mg of ascorbic acid (C6H7O6; Ka = 8.0 x 10-5 is dissolved in a 250 mL glass of water. What is the pH of the solution? i tried answering this question multiple times but i still get it wrong.... can someone help? step-by-step please. what i did...
March 20, 2012 by Finding the pH of a weak acid?

Chemistry
how would I find the mass of something from the molality..... How many grams of water should be added to 25.0 g of NaCl to produce a 0.450 m solution?
February 10, 2010 by CC

Chemistry
Calculate the grams of solute required to make the following solutions. a)2500g of saline solution (0.90% NaCl (m/m)) b)0.050kg of 4.0% (m/m) MgCl2
April 27, 2010 by Kim

organic chemistry
What volume of physiological saline solution (90% by weight NaCl, in water) would give you a gram of salt when evaporated?
January 23, 2011 by tina

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