a density of 1.0 M solution of NaCL

29,825 results, page 69
  1. chemistry

    A solution of Na2CO3 is added dropwise to a solution that contains 1.34×10−2M Fe^2+ and 1.33×10−2M Cd^2+ . What CO3^2- concentration of is need to initiate precipitation? Neglect any volume changes during the addition.
  2. maths

    x^2-7x = 0 substitue x=7 into the equatiopn and explain why this shows that x=7 is the solution. ok so i do this: if x=7 then the equation becomes 7^2-49=0 7^2=49 49-49=0 so x=7 is correct (is that explanation enough?) now i have to write out a complete
  3. Chemistry (Acids and Bases)

    What is the pH of a 0.400 molar HCl solution? I did -log(.4)=.398. That seems too low. I think I need to find the molarity (M) of the solution, but I can't find it with the given information.
  4. Chemistry

    The solute molecules mixed with the solvent molecules in a solution cause the freezing point of a solution to be ______ than it is for an equal volume of pure _________.
  5. chemistry

    A sample of solid ammonium chloride, NH4Cl, is dissolved in water. The solution formed was found to be acidic. Can you please explain why the solution is acidic?
  6. chemistry

    A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution
  7. Chemistry

    What is the ionic strength, I, of a solution at 25C containing 0.002 mol/L of BaSO4 and 0.001 mol/L of BaCl2? What is the activity coefficient of Ba2+ in this solution?
  8. Aqueous Solution

    Write the positive and negative ions that result when the following compounds are dissolved in aqueous solution: Na2S (aq): (NH4)2CO3 (aq): K2SO4 (aq):
  9. Chemistry

    You have an unlimited amount of 12M HCl stock solution. You need to neutralize 2.00 grams of NaOH by slowly adding 0.100M HCl solution.
  10. math help

    A lab assistant wants to make FIVE LITERS of 31.2% acid solution. If solutions of 40% and 18% are in stock, how many liters of each must be mixed to prepare the solution. i don't even know what equation to use or anything, please help me, thank you.
  11. Chemistry

    Consider a 0.71 M solution of each of the following salt dissolved in distilled water. Will the solution by basic, neutral, or acidic? KI= NH4NO2= (CH3CH2)3NHNO2= (CH3CH2)2NH2ClO4=
  12. chemistry

    Calculate the pH of the buffer system after the addition of 0.1 mol of gaseous HCl of the solution. Assume that the volume of the solution does not change when the HCl is added.
  13. chemistry

    predict whether or not a precipitate will form if you mix 75ml of a NaOH solution with pOH = 2.58 with 125ml of a 0.018M MgCl2 solution. Identify the precipitate, if any.
  14. Chemistry

    I have to prepare 1ppm of Fe+2 solution in 1litre. How many grams of ferrous ammonium sulphate will be dissolved in 1litre to make above solution.. plzz guide me
  15. chemistry

    In an experiment designed to determine the concentration of Cu+2 ions in an unknown solution, you need to prepare 100 mL of 0.10 M CuSO4 as your stock solution. How many grams of CuSO4(s) should you use?
  16. Chem

    A titration was performed in which 56 ml of a .022M HCL solution was used to titrate 50 ml of a PB(NO3)2 solution a) what was original concentration of the Pb(NO3)2? b) How many grams of PBCl2 will ppt?
  17. Chemistry

    A titration was performed in which 56 ml of a .022M HCL solution was used to titrate 50 ml of a PB(NO3)2 solution a) what was original concentration of the Pb(NO3)2? b) How many grams of PBCl2 will ppt?
  18. science

    The concentration of commercially available concentrated nitric acid is 70% , or 15.9M In 100 grams of solution there are 1.11 mol of HNO3. Calculate the volume of 100 g of the Solution.
  19. chemistry

    Use the following balanced equation. 3Sr(OH)2 + 2H3PO4 --> 6H20 + Sr3(PO4)2 20 mL of H3PO4 is required to react with 40 mL of a 0.15 M Sr(OH)2 solution. What is the molarity of the H3PO4 solution?
  20. chemistry

    Calculate the theoretical yield of the precipitate formed when a solution containing 1.02 grams of lithium phosphate is mixed with a solution containing 2.72 grams of strontium nitrate
  21. chemistry

    find the mass of sucrose(molecular mass=342)required to be dissolved per 600cm3 solution to prepare a semi molar solution
  22. Chemistry

    A solution that contains a large amount of salt and a small amount of water is said to be a _______ solution. A. unsaturated B. saturated C. dilute D. concentrated im pretty sure its C
  23. physical science

    A solution that contains a large amount of salt and a small amount of water is said to be a __________ solution. A. dilute B. unsaturated C. concentrated D. saturated
  24. chemistry

    What volume of solution would be needed to deliver the stated amount of solute? 237 milligrams of solute from a solution that is 32.0 ppm? answer in liters
  25. Analytical chem

    SPECTROPHOTOMETRIC ANALYSIS OF STEEL I have a known molarity of KMnO4 solution. It was diluted by a factor of 20. Its absorbance is now 1.18. The length of the path is 1 cm.What is the molarity of the new solution.
  26. Chemistry

    A 453 mL solution has a chloride concentration of 0.0253 M. This solution was prepared by adding solid FeCl3 to water. How many grams of FeCl3 are required?
  27. chemistry

    Using a pipet, 25 mL of a 0.1205 M HCl solution was placed in a 100 mL volu metric flask and the flask filled to the mark with water. What is the concentration of the new solution?
  28. Chem3

    A solution is prepared by dissolving 22.8 mL of methanol (d = 0.782 g/mL) in 100 mL of water (d = 1.00 g/mL) so that the final volume of solution is 118 mL. What is the percent methanol by mass?
  29. Chemistry

    an aqueous solution contains 1.00g/L of a derivative of detergent lauryl alcohol.the osmotic pressure of this solution at 25 °c is 2.0 x 10³ Nm-², what is the molar mass of the detergent.
  30. chemistry

    write a balanced equation for the reaction that occurs when an aqueous solution of iron(II) chloride is mixed with an aqueous solution o potassium hydroxide.
  31. Chemistry

    Suppose that 18.84 mL of 0.315 M Ca(OH)2 is required to neutralize 18.2 mL of aqueous HCl solution. What is the molarity of the HCl solution? All help is appreciated. Would also like help showing which numbers go where within any equations! Thanks so much!
  32. math

    in her chemistry class, Lauren must produce 300ml of an 80% acid solution. Her teacher gives her two concentrations of acid solution, a 50% and a 100%. determine how much of each concentration that she must use.
  33. Chemistry

    2.562 g of H2C2O42H2O (s) was obtained and dissolved in enough DI water to form 150.0 mL of solution. What is the concentration of the resulting of H2C2O4 (aq) solution?
  34. Science

    What is the molarity (moles per liter) of a solution in which 80 grams of sodium hydroxide, NaOH, is dissolved in 1 liter of solution? How do I convert the 80grams into mols?
  35. Chemistry

    If 18.8mL of 0.800M HCL solution are needed to neutralize 5.00mL of a household ammonia solution, what is the molar concentration of the ammonia? How do I solve this? Thank you.
  36. Chemistry

    Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.
  37. chm

    Calculate the PH OF A SOLUTION prepared by mixing 15.0mL OF 0.50 M OF NaOH AND 30.0mL OF 0.50 M BENZOIC ACID SOLUTION?( Benzoicacid is monoprotic and its dissociation constant is 6.5*10^-5)
  38. Math/Algebra

    Solve the following system of equations. x+7y=8 (1) x=2-7y (2) What is the solution of the system? Type the ordered pair state that there is no solution. I don't understand what they are asking me to do. Should I use #2 in equation #1 or something else?
  39. Chemistry

    What is the concentration of HCl when 25.0 mL of HCl completely reacts with 10.0 mL of 0.1M solution of NH4OH (subscript 4)? Solution steps would be helpful so I can solve other similar problems.
  40. Chemistry

    A student mixes 675 mL of water and 256 mL of 3.30 x 10-5 M orangefood dye solution. What is the concentration of this new dilute solution of orange food dye?
  41. chemistry-science

    A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml of 1M NaOH, what is the pH? (pka = 4.74)
  42. analytical chemistry

    Determine the concentration of iron in an aqueous solution containing 0.2810 grams of Fe(NH4)2(SO4)2 per liter of solution. Express the concentration in mg/dl.
  43. Chemistry

    Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.
  44. Chemistry

    An aqueous solution contains 0.196 M hydrosulfuric acid and 0.190 M hydrochloric acid. Calculate the sulfide ion concentration in this solution. [S2-] = _________mol/L.
  45. Chemistry

    An unknown solution was treated with BaCl2 and a white precipitate formed which did not dissolve in hydrochloric acid. What anion(s) could be present in the unknown solution?
  46. calculus

    Please help. I have an implicit answer to a differential equation of 18y*sqrt(y)=(2(x^2-6x+23)^3/2)/3 plus arbitrary constant. What is the particular solution to this for which y=2 when x=1. And then express this particular solution answer in an explicit
  47. Chemistry

    A student mixes 450 mL of water and 116 mL of 7.90 x 10-5 M greenfood dye solution. What is the concentration of this new dilute solution of green food dye?
  48. Chemistry

    How many mL of a solution of NaOH with pH equal to 1.395 x 101 do you need to mix with pure water to obtain 399 mL of a final solution with pH equal to 9.066 ?
  49. Chemistry

    54.0 mL of a 1.50 M solution is diluted to a total volume of 258 mL. A 129-mL portion of that solution is diluted by adding 165 mL of water. What is the final concentration?
  50. aqueous solution

    Write the positive and negative ions that result when the following compounds are dissolved in aqueous solution: Na2S (aq): (NH4)2CO3 (aq): K2SO4 (aq):
  51. chemistry.

    When 41.81 of a solution of aqueous sliver ions with a concentration of 0.2040 mol dm3 is added to a solution of XO-3/4 ions, 1.172g of the precipitate is formed? ..Can any one help me with that! NB: -3/4 mean that 3 is up and 4 is under it.
  52. Chemistry

    You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution? (show work Please)
  53. CHEMISTRY

    If the OH ion concentration in an aqueous solution at 25 celsius is 3.4x10^-3 M the the H concentration in moles per liter in the same solution is? answers is 2.9x10^-12 i do the -log and i get 2.46 i don't know that else
  54. chemistry

    A student placed 12.5 of glucose () in a 100.- volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the calibration mark on the neck of the flask was reached. The flask was then shaken until
  55. Chemistry Help Please!!!

    A student placed 17.0 g of glucose (C6H1206) 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
  56. chemistry

    n the spectroscopic analysis of many substances, a series of standard solutions of known concentration are measured to generate a calibration curve. How would you prepare standard solutions containing 10.0, 25.0, 50.0, 75.0, and 100. ppm of copper from a
  57. Chemistry

    A student placed 12.0g of glucose (C6H1206) 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
  58. General Chemistry

    Carbonic acid forms when carbon dioxide dissolves in water. A typical can of soda contains a 0.120 M solution of CO2. Assuming that all dissolved CO2 is present as carbonic acid, and that no other substances dissolved in solution affect the pH, what is the
  59. physics

    A large balloon of mass 237 kg is filled with helium gas until its volume is 318 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. (b) Calculate the buoyant force acting on the balloon.________N (c) Find the net force on
  60. Chemistry

    A potassium hydroxide solution has a pH of 12.90. Enough cid is added to react with half of the OH- ions present. What is the pH of the resulting solution? Assume that the products of the neutralization have no effect on pH and that the amount of
  61. Chemistry

    What is the maximum mass of cobalt (II) phosphate that will precipitate from a solution prepared by adding an excess of K3PO4 solution to 100.0 mL of 5.0 M CoCI2? Sorry for all the confusion with different names we are working in a group and its easier to
  62. Pre Cal

    Let P be the point on the unit circle U that corresponds to t. Find the coordinates of P and the exact values of the trigonometric functions of t, whenever possible. (If there is no solution, enter NO SOLUTION.) 4ð = ( , ) sin(4ð) = cos(4ð) = tan(4ð) =
  63. 8th grade

    Dear Sir, I have question related to Acids and Alkalis is that;- You are given a colourless solution.Describe three tests you would carry out to determine the solution is an acid or an alkali without tasting or using indicators. Please reply me quikly
  64. chemistry

    Bill prepared 5.00-mL of borax solution at 59.2degrees C. He diluted the solution in an Erlenmeyer flask and titrated it to an endpoint with 27.05 mL of 0.500 M HCl. What is the saturation concentration of borate ions? I don't know what to do here. Does it
  65. Chemistry

    Using Volumetric Glassware to Measure, Dilute,and Titrate Acid Solution 1)For each of the following procedural errors, indicate whether the calculated molarity of the HCl solution would be higher or lower than the actual molarity. Briefly explain. a)The
  66. Math

    4(2x + 3) = 2(3x - 4) one solution infinite solutions * my answer* no solution 6 - a = 1/3(9a - 18) one solution * my answer* infinite solutions no solution 3(4x - 3) - 7x = 5x - 9 one solution infinite solutions *my answer* no solution 4(2x - 3) - 4x
  67. 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.
  68. CHemistry Please Help..............LAB

    Standardization of the Sodium Thiosulfate Solution Make up a standard solution of potassium iodate by accurately “weighing by difference” about 0.1 g of KIO3 and placing it in your 100 mL volumetric flask. Fill the flask to mark with distilled water.
  69. CHEMISTRY

    Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. If the addition of 10.0 mL of a NaIO3 solution to the Cr (III) ion solution causes precipitation to begin, what is the concentration of
  70. Chemistry

    Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) If 2.00 g of Mg reacts completely with 50.0 mL of HCl solution, what is the molarity of the HCl solution?
  71. algebra

    Use < or > to make the statement true. -11 > -5 is this right. Solve for the indicated letter. b=2c for c The solution is c=2*c is this right. Solve -0.5<-20 THe solution is (x|4 Check these problem for me please
  72. Algebra

    Solve the system by substitution. State whether the system has one solution. Infinite solutions, or no solution. 2x+y=10 x-3y=-2 I believe that the answer is x=4 y=2
  73. maths

    explain why sin(theta)=-0,5 has no solution at an interval (0°;180°) my solution: Because in quadrant two the sin is positive
  74. Chem

    A 0.2 M KOH solution has a volume of 3 L. What percent of water should be evaporated to obtain a 0.6 M KOH solution? The answer I got is, 66.7%
  75. chemistry

    Suppose you have 0.500 M sucrose stock solution. How do you prepare 250 mL of 0.348 M sucrose solution ?
  76. Chemistry

    How many mL of a 10.0% by volume stock solution of HCl must be diluted with enough water to make 300.mL of a 1.5% by volume solution?
  77. Math

    Solve two solutions. If there is a solution write it or I there isn't any write no solution. -3ly-3l = 9 (l l is absolute value sign)
  78. chemistry

    how many grams of NaOH should be used to make 200 mL of a 0.24M solution of NaOH starting with a .4M HCL solution
  79. Chemistry (evaporation)

    A 0.2 M KOH solution has a volume of 3 L. What percent of water should be evaporated to obtain a 0.6 M KOH solution?
  80. chemistry lab

    what is the number of moles of a 0.05 M KMnO4 solution that react with 20 ml of a 0.02 M solution of FeCl2 if 75 ml of KMnO4 was required
  81. Chemistry

    Enough of a monoprotic acid is dissolved in water to produce a 1.47 M solution. The pH of the resulting solution is 2.64. Calculate the Ka for the acid.
  82. chemistry

    Have 250 mL of a 0.80 M solution of silver nitrate AgNO3 dissolved in water. how many grams of AgNO3 does the solution contain
  83. chemistry

    calculate the concentration of a solution when 35.0g of k2so4 is dissolved in enough water to make to make 125.0g solution.
  84. chemistry

    A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH? Please helps me to solve it for me
  85. science:Chemistry

    Find the pH of a solution obtained by mixing 100cm3 of 01MHCl solution with 100cm3 of 0.2M NaOH
  86. CHEMISTRY

    How many grams of dry need to be added to 1.90 of a 0.800 solution of ammonia, , to prepare a buffer solution that has a of 9.00? Kb for ammonia is 1.8*10^-5.
  87. chemistry

    a solution has gluten concentration of 2000ug/mL at 150uL. if 2uLof that solution is taken out what is the quantity of gluten in ppm?
  88. Chemistry

    how would the presence of a white solid in a solution effect the solution's absorbance? it made its absorbance higher, but i'm not too sure why
  89. Chemistry

    What is the molarity of a nitric acid solution if 43.33 mL of 0.10000 KOH solution is needed to neutralize 20.00 mL of the acid?
  90. chemistry

    A mixture is made using A 50.0 mL sample of a 0.20 M aqueous solution of NAOH was added to 50.0 mL of a 0.20 M aqueous solution of HCl.What is its pH at 25.0 °C?
  91. Chemistry

    If you mix 40.0 mL of a 0.389 M solution of K2CrO4 with 40.0 mL of a 0.389 M solution of AgNO3, what mass of solid forms?
  92. chemistry

    what is the molarity of a HCl solution that contains 13.0 g of HCl in 125 mL of solution? Answer in units of M is it 3791.944 ?
  93. math

    is each ordered pair a solution of the given system? write yes or no. 1. y=6x+12 2x-y=4 (-4, -12) 2. Y= -3x x=4y+1/2 (-1/2,3/2) 3.x+2y=2 2x+5y=2 (6,-2) 4. Solve the system by graphing. Check your solution. x + y=3 x - y=-1
  94. chemistry

    A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 10-11 for Mg(OH)2 and Ksp = 6.0 10-26 for Sn(OH)2.
  95. chemistry

    Why is the 6M NaOH solution diluted before titrating the vinegar sample? How might your results be affected if you used the 6M solution rather than the 0.3M NaOH?
  96. Chemistry

    A buffer solution contains 0.052 M HC2H3O2 and 0.025 M NaC2H3O2. The pH of this solution is _____. Ka for HC2H3O2 is 1.8x10-5.
  97. 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
  98. Chemistry

    You have a stock solution of 15.0 M NH3 . How many milliliters of this solution should you dilute to make 1200ml of 0.280 M NH3 ?
  99. Chemistry

    Use the Henderson-Hasselbalch equation to calculate the pH of each solution: a solution that contains 1.05% C2H5NH2 by mass and 1.10% C2H5NH2Br by mass
  100. Chemistry

    Exactly 23.6 ml of a 0.131 N HCl solution was required for complete neutralization of 25.0 ml of an NaOH solution.What was normality of the NaOH?