Sunday
April 26, 2015

Search: Calculate the solubility (in grams per 100 mL of solution) of magnesium hydroxide in a solution buffered at pH = 12.

Number of results: 64,963

chem
determine the osmotic pressure of the solution at STP. (Assume these solutions behave ideally.) a)0.116 mol fraction glucose (C6H12O6) in water (Assume the density of the solution is 1.02 g/mL.) b)0.0948 mol fraction NaCl in water (Assume the density of the solution is 1.00 g/...
January 26, 2011 by Rukky

Chemistry
1.630 g of iron ore is dissolved in an acidic solution. This solution is titrated to a pink endpoint with 27.15 mL of a 0.020 M KMnO4 solution. a. How many moles of MnO4- ions were consumed? b. How many moles of Fe2+ were in the iron ore sample? c. What is the percent of iron ...
September 8, 2014 by Ray

Chem
As a part of a study to see whther just the chloride ion on NaCl accelerates the rusting of iron, a student decided to see whtjer iron rusted in a solution on Na2SO4. The solution was made by dissolving 4.550 g of Na2SO4 in water using 125.0 mL volumetric flask to adjust the ...
July 6, 2009 by Lena

Chemistry
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution...
February 11, 2009 by Danielle

Chemistry
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution...
February 11, 2009 by Danielle

Chem
I need help please! You have been given 40ml of a 0.6M solution of NaCl and 40ml of a 0.1M solution of KCl. You are also given as much diluent as you need. Show all your work and indicate how you would make 40ml of a single solution that contains 0.005M NaCl and 0.025M KCl.
May 7, 2012 by Jen

chemical calculations
A brick of silver with a mass of 31.5 kg measures 0.150 m long, 42.0 cm wide, and 72.00 mm thick. Calculate density of silver in grams per cubic centimeter?
February 2, 2014 by Michael G

Another caffeine from tea question
Can anyone show me the reaction of sodium carbonate with water to produce bicarbonate and hydroxide as sodium carbonate dissolves? And if any, what is the reaction of tannins and caffeine with this solution? Thanks loads!
November 29, 2008 by Scott

Chemistry
When 50 mL of 1.0 M AgNO3 is added to 50 mL of 0.50 M HCl, a precipitate of AgCl forms. After the reaction is complete, what is the concentration of silver ions in the resulting solution? (a) 0.50 M (b) 1.0 M (c) zero (d) 0.25 M (e) 0.75 M How do I go about solving this? I ...
February 1, 2010 by Anonymous

chemistry
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get...
April 1, 2013 by Brooke

chemistry
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get...
April 2, 2013 by Brooke

chemistry
In a coffee cup calorimeter, 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH are mixed to yield the following reaction: HCl + NaOH  NaCl + H2O. The two solutions were initially at 22.1 oC and the final temperature is 24.2 oC. Calculate the heat that accompanies this ...
March 16, 2015 by Diana

Precalculus...repost.. The tutor didn't quite answ
Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when I plugged -7.5 in for...
May 24, 2014 by Anonymous

Chemistry
The solubility of AgCl (s) is 2.5 x 10^-5 M. calculate the ksp
July 10, 2013 by Mike

Chemistry 2
CALCULATE THE SOLUBILITY OF CuBr in 0.69 M NH3
March 25, 2014 by Joe

MOLARITY QUESTION
I am trying to answer a bunch of lab questions about a lab I did and am stuck on finding the morality of the diluted vinegar solution? Can anyone help me? (I hope I gave enough info) Here where the lab procedures that I already went through: Transfer 10mls (Vc)of vinegar to a ...
June 12, 2009 by Gweedo8

Chemistry
A 2.28 m solution of the solute formic acid dissolved in the solvent H2O is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 12.40 mol of formic acid. Correct Answer = 6.01 Molar Mass (g/mol): HCO2H 46.03 H2O 18.015 Density ( g/mL ): HCO2H 1....
June 6, 2010 by Fred

chemistry
calculate grams of potassium bromide dissolved in 50 grams of water at 0 celcius
May 18, 2012 by Anonymous

science
calculate how many grams of chloride ions are present in 50 grams of ocean salts
April 17, 2013 by T-perry

algebra
To solve the inequality -1/2 k is greater then or equal to -5, Danny multiplied both sides by the reciprocal of -1/2 . His solution was k is greater then or equal to 10.What mistake did he make? Danny checked his solution, but his check did not let him know that he had made an...
December 9, 2010 by lala

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 Lab
The absorbance of a 6.3x10^-5M solution of an iron complex was measured to be 0.328 at the optimum wavelength. A second solution of the iron complex has an absorbance of 0.833 measured under identical conditions. What is the molarity of the complex in the SECOND SOLUTION?
March 15, 2010 by L**

Chemistry
Which of the following results from the presence of a solute in a given solvent? A. The vapor pressure of the solution is lower than that of the pure solvent. B. The boiling point of the solution is lower than that of the pure solvent. C. The freezing point of the solution is ...
May 22, 2014 by Alexa

Help now please, Chemistry
How many grams of oxygen can be produced by heating 10.0g of mercury (II) oxide? Sulfuric acid is added to 8.10g of magnesium, how many grams of hydrogen are set free? I'll do the first. You do the second by following the first as a guide. 1. Write the balanced equation. 2HgO...
March 5, 2007 by Beautiful

maths
which of the following statements is incorrect? 1 microlitre=10^-6 litres 1 megagram=10^6 grams 1 millimetre=10^3 metres 1 kilogram=10^3 grams 100 centimetres=1 metre thanks andy
May 11, 2010 by Andy

chemistry
a sample of a radioisotope had a mass of 100.0 grams. After exactly 24 days, 6.25 grams remained. The half life of the isotope is _________
June 3, 2011 by rick

Chemistry
Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide 1. before addition of any base 2. after addition of 30.0mL of base 3. after addition of 100.0mL of base 4. after ...
April 25, 2011 by Michael

CHEM
Calculate the molar solubility of gold(I) chloride (Ksp= 2.0 x 10^-13) in .10 M NaCN. The complex ion formed is [Au(CN)2]- with Kf= 2.0 x 10^38. Ignore any other competing equilibrium systems. I'm having trouble writing an equation to start off with. First, I had written AuCl...
April 15, 2007 by Kristina

Chemistry(Please respond)
I did an experiment to study the effects of changes in conditions on an equilibrium system. The first system was the dissociation of acetic acid. HC2H3O2 -> H^+^ + C2H3O2^-^ <- We had to add 2mL of acetic acid into a test tube and we had to test the pH of the solution ...
March 14, 2012 by Hannah

Maths
Hi I am really sorry I now people have already attempted to help me with this one already, however I am still not able to understand, I really have not done a lot of these equations and am struggling. I have put a little more information down this time, any help is much ...
February 17, 2011 by Claire

math,help!!!!!
Let A be a 2*3 coefficient matrix ;A a)If the system Ax=b is consistent is the solution unique? why or why not? explain b) how many pivots must A have to gurantee that Ax=b has a solution for every vector b in IR^2? c) can the columns be linearly independent? 4 5-1=4
February 11, 2007 by jasmine20

chemistry
When an aqueous solution is cooled to low temperatures, part of the water freezes as pure ice. What happens to the freezing point of the remaining solution when this occurs? Explain.
January 31, 2009 by Anonymous

chemistry
This is confusing. I am supposed to explain how to prepare a solution using the proper lab equipment (both from dry solid and a stock solution) Help would greatly be appreciated...
February 21, 2009 by Anon

chemistry
sorry i forgot some of the units in the initial posting 8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, , in this solution?
November 2, 2009 by katy

CHEM 102
A solution of volume 0.500 L contains 1.70g NH3 and 4.15g (NH4)2SO4. What is the pH of this solution? Answer obtained was 9.76, however it states that it is slightly off...
October 21, 2011 by Calvin

chemistry
What volume (in liters) of 0.96 M KOH solution should be added to a 0.090 L solution containing 9.9 g of glutamic acid hydrochloride (Glu, FW=183.59; pKa1=2.23, pKa2 =4.42, pKa3=9.95) to get to pH 10.20?
May 3, 2013 by shanonn

chemistry
What volume (in liters) of 0.94 M KOH solution should be added to a 0.090 L solution containing 9.1 g of glutamic acid hydrochloride (Glu, FW=183.59; pka1=2.23, pka2=4.42, pka3=9.95) to get to pH 10.20?
May 23, 2013 by Decisice 2

chemistry
if you dissolve 20mg of alcl3 into 2.0 of a 2.5 molal nacl solution (density 1.08kg/l), what would be the mass concentration (ppm(weight)) of al3+ in the resulting solution?
January 26, 2014 by Ashley

CHEM
Can you show me the formula I need to do this problem. please a solution is made by dissolving 0.35 mole of LiI in enough water to give a final volume of 2.60 ml. What is the molarity of the solution? thank you
March 25, 2014 by julia

Chemistry
What is the molarity of an Acetic Acid Solution that requires 40.0 ml of 0.100M NaOH to titrate a 20.0ml sample to the end point? (Balanced equation & solution please! Thanks in advance)
June 6, 2014 by Gage

chemistry
Please help?! if 600 mL of a 0.04M KCl solution is mixed with 50mL of a 0.03M Na2SO4 solution, will a precipitate be formed? Explain your reasoning and/or show all calculations?
February 1, 2015 by ryan

Chemistry
Calculate the mass percent (m/m) for the solute in 2 grams of KOH in 20.0 grams of H2O? How do I set this up?
May 5, 2011 by Curlyqty

chemistry
Which of the following statements about boiling points are true? A. The boiling point of 0.1 m NaF(aq) is lower than the boiling point of 0.1 m methanol(aq). B. The boiling point of a 0.5 m aqueous solution of LiOH is the same as the boiling point of a 0.5 m aqueous solution ...
April 18, 2013 by Anonymous

Algebra
Match ABCDE with the solution set below A. {4/3, -4} B. {x|x > 4 or x < -4/5} C. No Solution D. {x| -11 < x < -7} E. All Real Numbers Solution set ABCDE|x + 9| < 2 ABCDE|5x - 8| > 12 ABCDE|3k + 4| = 8 ABCDE|x - 6| = -10 ABCDE|6x + 8| > -4
June 7, 2009 by Nick K.

Math
Decide whether each equation has one solution, no solution, or infinitely many solutions. 2(x-3)=2x A. One Solution B. No solutions C. Infinitely many solutions Is the answer A?
September 16, 2014 by Gwen

Chemistry!!!~!!
A solution of sodium chloride in water has a vapor pressure of 18.5 torr at 25C. What is the mole fraction of NaCl in this solution? What would be the vapor pressure of this solution at 48C? The vapor pressure of pure water is 23.8 torr at 25C and 83.7 torr at 48C. I've ...
April 19, 2010 by Jenn

Chemistry
Metal cations can act as lewis acids in water to produce an acidic solution even though the metal ion contains no hydrogen. Water hydrates the ions in solution and partial loss of electrons from water allows hydrogen ion to be lost What is the pH of a 0.1209M solution of Al3+ ...
April 16, 2011 by Jude

Solve the polynomial inequality
Solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation. x^3+x^2+4x+4<0 The solution set is=
April 9, 2013 by Jill

acid-base titrations
For each of the following circumstances, indicate whether the calculated molarity of NaOH would be lower, higher or unaffected. Explain your answer in each case. a.the inside of the pipet used to transfer the standard HCI solution was wet with water. b.You added 40mL of water ...
April 21, 2008 by natash

College Chemistry
A mixture of the compounds sodium oxide and magnesium chloride contains 2.4182 g of sodium oxide and is 89.3 % by mass magnesium chloride. The sodium oxide is 74.200 % by mass sodium. Calculate the moles of oxygen in the mixture. Thanks in advance.
April 4, 2012 by Lance

Chemistry help!!
A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? It says to first calculate...
April 22, 2012 by Kate

chemistry check my answer
In an acid base titration 32.5 ml of sodium hydroxide were neautralized by 17.6 ml of 0.180 mol/l sulfuric acid. Calculate the concentration of the sodium hydroxide. I asked this question earlier but i wanted to make sure i got the right answer My answer: 0.36 mol/L is this ...
January 12, 2015 by Sandy

Chemistry
Determination of the solubility product of PbI2. From the experimental data we obtain [I-] directly. To obtain Ksp for PbI2, we must calculate [Pb2+] in each equilibrium system. This is most easily done by constructing an equilibrium table. We first find the initial amount of ...
April 7, 2011 by Laura

business Communication
1. Which of the following statements explains why threats are NOT effective for motivating people? A. Threats reduce tension. B. Threats ensure that appropriate actions are not abandoned. C. Threats produce permanent change. D. Threats provoke counteraggression. I think the ...
July 29, 2012 by Ron

Chemistry
Calculate pH of a solution by mixing 15.0 mL of .50 M NaOH and 30.0 mL of .50 benzoic acid solution (benzoic acid is monoprotic, its dissociation constant is 6.5 x 10^ -5). I am not sure whether I am supposed to do it by acid-base titration way or to use the formula -log (Ka...
July 28, 2009 by Soojung

chemistry
Calculate the pH from the addition of 10 mL of a 0.10 M NaOH solution to 90 mL of 0.10 M HCl. okay so i understand how to do most of it but i get messed up at one part.. so i made my equation: NaOH + HCl -> H2O + NaCl (strong base, strong acid= complete dissociation) so net...
November 8, 2011 by BOB PLEASE HELP!:)

Chemistry
Provide equations for each of the following: a. Dissociation of a strong base in water solution b. Ionization of a strong acid in water solution: c. Ionization of a weak acid in water solution: d. Ionization of a weak base in water solution: e. Autoionization of water:
April 29, 2014 by ASAP!!

chem
Consider the titration of 20 mL of .105M Butric Acid HBut, with .125M sodium Hydroxide? calculate the pH before titration calculate the volume of added base to reach the end point calculate the pH halfway to the equivalence point kb(But-)= 6.6x 10^-10 and ka(HBut)= 1.5x 10^-5 ...
March 1, 2010 by simi

GEN CHEM
make 200.0 mL of a pH 5.00 buffer from 0.200 M acetic acid and 0.100 M sodium acetate. Calculate the volume of 0.200 M acetic acid and the volume of 0.100 M sodium acetate required to make 200.0 mL of a buffer solution with pH = 5.00. The Ka for acetic acid at 298 K is 2.00 x ...
April 26, 2011 by GEN CHEM

Chemistry
An example of a solution that exhibits a positive deviation from Raoults Law (total pressure is greater than expected) is a solution of acetone (CH3COCH3) and carbon disulfide (CS2). a) Draw Lewis structures for these molecules. Explain the deviation from ideal behavior in ...
March 11, 2012 by Laffy Taffy

chemistry
Why is caffeine only soluble in water that is strongly acidic? Is that true? I think the solubility of caffeine is about 180 mg/L in water @ 100 Celsius. I guess it depends upon your definition of solubility. At any rate, look at the structure of caffeine. There is a N in one ...
August 18, 2007 by manny

chemistry
cooler water has more dissolved oxygen: hot water has hardly any at all. Oh, so they go to the bottom to get oxygen. Why does cooler water have more dissolved oxygen? Generally gases are more soluble in cold water than warm water. Think of an open coke can in the refrigerator ...
April 19, 2007 by bobpursley

chemistry help
What mass of ammonium chloride can be added to 100 g of water at 20 degrees C before the solution becomes saturated?
May 20, 2009 by kate

Chemistry
A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the besst procedure for preparing this solution ?
February 22, 2012 by Cynthia

Chemistry
A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the best procedure for preparing this solution ?
February 22, 2012 by Cynthia

Chemistry
Describe how you would prepare 2.00 L of an aqueous solution having a pH=3.60, if you had a supply of 0.100 M HCl available.
April 12, 2012 by Beth

Chemistry
Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.
February 25, 2013 by Dee

math
8 gallons per hour each gallon wt. 7 1/4 in six hours what is the amount in pounds?? and how did you arrive at this solution??
October 21, 2013 by dw

Chemistry
A 10.00 ml sample of vinegar, density 1.01g/ml, was diluted to 100.0ml volume. It was found that 25.0 ml of the diluted vinegar required 24.15ml of 0.0976 M NaOH to neutralize it. Calculate the strength of CH3COOH in terms of: a) molarity b) grams CH3COOH per litre c) % ...
November 18, 2014 by Candice

Decision science
A wholesaler of stationery is deciding how many desk calendars to stock in inventory for the coming year. It is impossible for him to reorder, and leftover units are worthless. The following numbers indicate the possible demand levels: Demand in 000's 100 300 200 400 The ...
September 15, 2011 by Samir

science
How many grams (to the nearest 0.01 g) of NH4Cl (Mm = 53.49 g/mol) must be added to 700. mL of 1.294-M solution of NH3 in order to prepare a pH = 9.70 buffer? (pka of NH3 = 9.25)
November 2, 2007 by ashleigh

Chemistry
How many grams of sodium nitrate, NaNO3 are needed to make 250 ml of .500 M solution? MM of NaNO3 is 85 g/mol?? I'm not sure which equation to use, help please?
April 15, 2010 by Nick Bones

chemistry
According to reference table G,which substance forms an unsaturated solution when 80 grams of the substance is dissolved in 100grams of hydrogen 2 oxygen at 10 degrees celsius?
April 19, 2010 by felisha

CHEMISTRY
how many grams of glucose, C6H12O6 and water are in 600g of 5.5% by mass glucose solution? please indicate the general formula to use to solve this problem.
October 11, 2014 by Ej

Chem
a) An ethylene glycol solution contains 21.1 g of ethylene glycol in 86.0 ml of water. compute the freezing point of the solution. b) Compute the boiling point of the solution.
March 13, 2011 by Emilene

chemistry
The solubility of a gas is 0.34 g/L at STP. What is its solubility at a pressure of 0.80 atm and the same temperature?
March 27, 2008 by trista

Chemistry Homework Help Please!
1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of NaOH be added to this ...
November 24, 2014 by Always

CHEMISTY HOMEWORK HELP ASAP
1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of NaOH be added to this ...
November 24, 2014 by Always

Chemistry
Calculate how many grams of O2(g) can be produced from heating 37.0 grams of KClO3(s). Formula: 2KClO3 = 2KCl + 3O2
October 8, 2014 by Lexi Hanson

chemistry
Calculate how many grams of O2(g) can be produced from heating 31.8 grams of KClO3(s).
March 15, 2015 by 7

chemistry
what is the solubility of potassium nitrate (KNO3) in 100.0g of water 80degrees celcius
November 20, 2009 by Anonymous

chemistry
what is the solubility of potassium nitrate (KNO3) in 100.0g of water at 80.0 degrees celcius?
April 7, 2011 by veronica

Chemistry
The high acid rain which falls in the Northeast frees aluminum ions from the soils. The tree absorbs the aluminium ion. The sap is basic so the aluminium ion becomes aluminum hydroxide. Aluminium hydroxide is a large bulky molecule that plugs the water/nutrient transport ...
November 8, 2012 by I need Help

Math
Maggie's surprise gift weighs between 8.48 grams and 11.25 grams. Which of these weights could be the weight of the gift? 8.19 Grams 8.75 grams 11.47 grams 11.75 grams ~~~~~~~~~~~~~~~~~~~ How would I show my work on paper for this?
April 30, 2012 by Syd

albegra
PPease help me answer these question? (1) How do you know ifa value is solution for an inequality? (2) How is this different from determining if a value is solution to an equation? (3) If you replace the equal sign of an equation with an inequality sign, is there ever a time ...
October 15, 2008 by PJ

Chemistry-Dr Bob help!!
0.100 M solution of a weak acid, HX, is known to be 15% ionized. The weak acid has a molar mass of 72 g/mol. 1. What is Ka for the weak acid? 2. What is the pH of the buffer prepared by adding 10.0 g of the sodium salt of the acid (NaX) to 100.0 mL of 0.250 M HX
April 4, 2012 by clayton

Chemistry
Hello everybody, I'm told that potassium permanganate is dissolved in an aqueous buffer of ammonia and ammonium at equal concentrations (1M), and treated with 1M sodium hypochlorite, the permanganate ion is reduced to insoluble manganese dioxide as the hypochlorite ion is ...
July 18, 2007 by John Peterson

chemisty
0.100 M solution of a weak acid, HX, is known to be 15% ionized. The weak acid has a molar mass of 72 g/mol. 1. What is Ka for the weak acid? 2. What is the pH of the buffer prepared by adding 10.0 g of the sodium salt of the acid (NaX) to 100.0 mL of 0.250 M HX
April 4, 2012 by Clayton

Chemestry
the solubility of a gas is 0.34g/L at STP. What is it's solubility at a pressure of 0.80 atm and the same temperature?
March 22, 2010 by David

Chem
if salt has the solubility product expression Ksp={Br3+}2{S2-}3 what is the equilibrium equation for the solubility?
December 3, 2011 by Tammy

chemistry, biotechnology
The question is: "The molar extinction coefficient of pure antibody is 1.4 absorbance units per milligram antibody @280nm. You have a concentrated antibody solution, so you make a 5-fold dilution and measure @280, getting an absorbance of 0.845. What is the concentration of ...
October 2, 2014 by Jennifer

chemistry
I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture.
April 29, 2010 by albee

Managerial Economics
Suppose Bill is on a low-carbohydrate diet. He can eat only three foods: Rice Krispies, cottage cheese, and popcorn. The marginal utilities for each food are tabulated below. Bill is allowed only 167 grams of carbohydrates daily. Rice Krispies, cottage cheese, and popcorn ...
March 3, 2010 by Nauman

Chemistry
You are asked to prepare a temperature bath that freezes at -25 degrees C, using only water and ammonium sulfate. a. How many grams of ammonium sulfate would you need to prepare this bath if you start with 500 grams of water? b. What would the boiling point (degrees C) of this...
November 14, 2012 by Robin

chemistry
a 3.54 grams solid sample of an unknown monoprotic acid was dissolved in distilled water to produce a 47.0 mL solution at 25 degrees. This solution was then titrated with 0.2 M NaOH. The equivalence point was reached when 35.72 mL of 0.2 M NaOH was delivered. A. find the ...
April 1, 2015 by jk

chemistry help
a 3.54 grams solid sample of an unknown monoprotic acid was dissolved in distilled water to produce a 47.0 mL solution at 25 degrees. This solution was then titrated with 0.2 M NaOH. The equivalence point was reached when 35.72 mL of 0.2 M NaOH was delivered. A. find the ...
April 1, 2015 by jk

chemistry
Here is the full lab: Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: Balance Steel can Tin electrode Power Source Wire lead (x2) tin(II) chloride solution (3.25 M) Timer Large beaker Procedure: Take ...
April 18, 2008 by Rendier

Chem again
The solubility of Acetanilide in hot and cold water is: Temperature.........Solubility in 100ml H20 100C....................5.5g 0C........................0.53g What is the maximum recovery if 5.0g of acetanilide is recrystallized from 100mL of water? My ans: So this is what I...
March 8, 2010 by Natasha

Chemistry
What is the percentage yield for a reaction if you predict the formation of 21 grams of C6H12 and actually recomvered only 3.8 grams? is the answer 18% 3.8g/21g x 100% pls verify.
October 17, 2010 by Devin

Fat gram calculator
Design a program that asks the user for the number of fat grams and calories in a food item. Validate the input as follows. Make sure the number of fat grams and calories are not less than 0. According to nutritional formulas, the number of calories cannot exceed fat grams * 9...
October 13, 2013 by John

  1. Pages:
  2. <<Prev
  3. 54
  4. 55
  5. 56
  6. 57
  7. 58
  8. 59
  9. 60
  10. 61
  11. 62
  12. 63
  13. 64
  14. 65
  15. 66
  16. 67
  17. 68
  18. Next>>

Members