a density of 1.0 M solution of NaCL

29,843 results, page 72
  1. chemistry

    A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.
  2. chemistry

    What is the pH of a solution of a monoprotic acid with a pKa of 6.6 if it is 39.3 % ionized in solution? Just provide the numerical answer, do not prefix with pH. Give your answer to two decimal places. Remember the definition of Ka
  3. difficult chemistry

    Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that excess kl and hcl were added. Who helps me
  4. chemistry

    Why do the concentrations of Pb 2+ and SO4 2- ions in a saturated solution of PbSO4 in contact with solid PbSO4 remain the same when the solution evaporates to half of its original volume? it has to do with equilibrium.
  5. help with chem biochem

    You have a 1 ml solution containing 100 uM Ethanol, and 1 mM NAD+. You then add 1 mg of alcohol dehydrogenase. Assume all of the ethanol gets converted to acetaldehyde . a) What will the final concentration of NADH be in the solution? 
  6. Chemistry

    A student is instructed to standardize an approximately 2.5N KOH solution using a 0.500N H2SO4 stock solution. Describe the experimental procedure he/she must follow. I do not understand what procedure needs to be followed.
  7. Chemistry

    If 0.630 grams of HNO3 (molecular weight 63.0) are placed in 1 liter of distilled water at 25 degrees C, what will be the pH of the solution? (Assume that the volume of the solution is unchanged by the addition of the HNO3.) A. 0.01 B. 0.1 C. 1 D. 2 E. 3
  8. chemistry

    What is the pH of a buffer solution if you have 250 ml of a 1.56M Acetic Acid and you added 26.56 grams of sodium acetate (NaCH3CO2)? What is the new pH if you now add 1gram of NaOH to the buffer solution?
  9. chemistry

    What is the molarity of a solution containing 8 grams of solute in 500 mL of solution? Round to the nearest hundredth. Don't forget the unit! (gram formula mass of solute = 24 g)
  10. chemistry

    sodium metal dissolves im liquid mercury to form of NA(s) and Hg(l) are 0.97 g/ml and 13.6 g/ml respectively. a sodium amalgoum is made by dissolving 10 ml Na (s) in 20.0 ml Hg (l). The final volume of solution is 21.0 ml. Calculate the molarity of Na in
  11. chem

    A scientist wants to make a solution of potassium phosphate, K3PO4 for a lab experiment. How many grams of K3PO4 will be needed to produce 575ml of a solution that has a concentration of K+ ions of 1.4M.
  12. biochemistry

    A solution was prepared by dissolving 8.0g of solid ammonium sulfate (MW= 132.14, specific volume= 0.565ml/g) in 35ml (i.e 35g) of water. What is the final volume of the solution?
  13. chem

    A sample of potassium hydrogen oxalate, KHC204, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.
  14. chemistry

    What is the molarity of a solution containing 8 grams of solute in 500 mL of solution? Round to the nearest hundredth. Don't forget the unit! (gram formula mass of solute = 24 g)
  15. Science

    A solution of silver nitrate is mixed with a solution of potassium sulphide.Write the molecular,total ionic,and net ionic equations illustrating the reaction.
  16. Chemistry

    Excess sodium sulfate is added to exactly 50 mL of a solution containing an unknown amount of silver(I) cation. Determine the concentration of the silver ion in this solution if 3.54 mg of a solid is isolated.
  17. chemistry

    A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final concentration of the nitrate ion?
  18. Pharmacy Calculations

    6. A doctor writes a prescription for 20 mg of Tobramycin antibiotic saline solution. The solution is to be injected intravenously one time a day. On hand we have a 30 mg/2 ml vial of Tobramycin.
  19. Chemistry

    When a 5.00 ml sample of vinegar is titrated, 44.5 ml of 0.100 m NAOH solution is required to reach the end point. What i sthe concentration of vinegar in moles per liter of solution?
  20. Chemestry

    What volume of 0.140 M K2Cr2O7 will be required to oxidize the Fe2+ ion in 81.5 mL of 0.176 M FeSO4 solution? Cr2O72- + Fe2+ Cr3+ + Fe3+ (acid solution)
  21. Algebra

    Solve the system of linear equations and check any solutions algebraically. (If there is no solution, enter NO SOLUTION. If the system is dependent, express x, y, and z in terms of the parameter a.) 3x-3y+6z=15 x+2y-z=11 5x-8y+13z=19
  22. math (please help, test tmrw)

    Determine a possible linear function f(x) such that x^2-x-2 < f(x)< x^3-x^2-2x has a solution and state the solution.(the < are supposed to have lines under that indicate less than/equal to) I just don't really get what it's asking. So I factored
  23. Math

    A glass containing 250 mL of 80% iodine solution tips over spelling part of its contents. This subsequently replaced by an amount from a mixture of 40% iodine. If a 72% solution is resulted, how much was spilled?
  24. Chemistry

    Calculate the pH of a buffered solution prepared from 0.25 mol KF and 0.75 HF after the addition of 0.05 mol of NaOH (assume a 1.0 L volume of solution) I get that i need to use two separate ice tables, but i don't really understand how to go about doing
  25. Chemistry

    12 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.11 M C2H3O2-. What is the pH of the resulting solution? I understand to use the ice method, however, i do understand what to plug into the hh equation.
  26. Chemistry

    A 200-mL solution of KCl(aq) was electrolyzed for 10.0 minutes, producing Cl2 gas at the anode and H2 gas at the cathode. If the pH of the final solution was 12.40, what was the average current (in amps) used?
  27. Chem

    You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v).
  28. Chemistry

    I still need help with this problem... Calculate the concentration of the solution the molality of hydroxide ions in a solution prepared from 9.16 g of barium hydroxide dissolved in 179 g of water I do not know how to approach this...I keep doing something
  29. Science- bio- Please help!!

    Pretend you are a medical professional and it your job to make an I.V. solution for a patient that has a total cellular solute count of 1.19%. What would be the perfect I.V. solution to administer to your patient?
  30. Math/dilution

    A powder concentrate contains 2% w/w of active ingredient. What would be the percentage concentration (w/v) of the resultant solution after a 5-g packet of powder is dissolved in enough water to make 1 quart of solution?
  31. CHEIMISTRY

    A buffer solution is 0.20 M in HPO42- ions and 0.l0 M in H2PO4- ions. What is the H3O+ ion concentration of the solution? The ionization constants for H3PO4 are as follows: Ka1 = 7.5 ´ 10 -3, Ka2 = 6.2 ´ 10-8, Ka3 = 1 ´ 10-12. a. 3.7 ´ 10-3 M b. 3.7 ´
  32. chemistry help asap please

    You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l.
  33. Science ap chem

    For which of the following solutions must we consider the ionization of water when calculating the pH or pOH? (a) 3 × 10−8 M HNO3 (b) 0.10 g HCl in 1.0 L of solution (c) 0.00080 g NaOH in 0.50 L of solution (d) 1 × 10−7 M Ca(OH)2 (e) 0.0245 M
  34. chem

    A solution contains 32 g of KNO3 per 100g of water at 25 degree C. Is the solution unsaturated, saturated, or supersaturated? I think its saturated Look at your saturation chart. I will be happy to critique your thinking. is there one online?
  35. chemistry

    1.92g sample of hydrogen peroxide solution generates 37.8mL O2 at 759 torr and 35 C. What is the percent strength of the peroxide solution? how would you solve this problem and which equations would you use?
  36. college algebra

    Solve the system of linear equations and check any solutions algebraically. (If there is no solution, enter NO SOLUTION. If the system is dependent, express x, y, and z in terms of the parameter a.) x +2z=5 3x-y-z=12 6x-y-5z=27
  37. Chemistry

    85.0 mL of 1.50 mol/L ammonium chloride solution is added to 250 mL of water. Calculate the molar concentration of the final solution The answer on the sheet says 0.381 mol/L but I keep getting 0.51
  38. Chemistry

    Calculate the end point pH, when 25 mL of 0.01 mol/L HCl solution reacts exactly with 25 mL of 0.1 mol/L NH4OH solution. NH3 Kb = 1.8 x 10^-5 This will be the pH of NH4Cl solution. NH4+ + HOH ==> NH3 + H3O^+ Ka = Kw/Kb = (NH3)(H3O^+)/(NH4^+). Solve for
  39. chemistry

    Find the unit cell (simple, bcc, fcc), type of holes where the smaller ions are found (tetrahedral, octrahedral, cubic), and number of cations and anions per unit cell for the following compounds: CdSe CsI Li2O KBr NaCl ZnS(I)
  40. MATH,HELP

    Can someone show me how to even do this problem. Find all positive values for K for which each of the following can be factored. x^2 + x - k News flash: It can be factored with any term (although the roots may not be real roots). Now if you mean factored
  41. chemistry

    determine the molarity of a 18 ml sample of HCl solution that is required to prepare 30 ml of 2.3 M HCl solution?
  42. chemistry

    what volume of a 0.5M solution of sulphuric acid is required to prepare 2 litres of a 0.4M solution of the acid
  43. human resources

    a chemist has 400 mililiters (mL) of solution that is 21% acid. How many mililiers of acid are in the solution
  44. math

    chemist has 6liter of 50% acid solution .how much water added to obtain 20% acid solution?
  45. Chemistry

    A solution contains 153g Na3PO4 and 415g H2O. What is the percentage concentration of Na3PO4 in this solution
  46. math

    25.0 mL of an unknown HCl solution is titrated with 17.5 mL 0.100 M NaOH. What is the Molarity of the HCl solution?
  47. Math

    A 7(1/2)% strength solution has been prepared. a) How many grams of medication are in the 7(1/2)% strength solution how do I setup this question?
  48. algebra 1

    y=2x-1 2x-y-1=0 a)this sytem has excatly onw solution b)this system has indinetly many solutions c)this system has no solution d)(1,1) and (0,0)
  49. Math 116 algebra please check

    Solve the following system of equations x + 6y =4(1) x = 9-6y (2) What is the solution of the system N There is no solution
  50. chemistry

    What volume for 1.5M KCl solution must be used to prepare 500. mL of a .550 M KCl solution? I need the set up
  51. Chem

    A precipitate is expected when an aqueous solution of porassium iodide is added to an aqueous solution of
  52. science

    What volume of .01M KOH solution is needed to react with 20ml .01M Zn(OH)2 solution
  53. Anatomy and Physiology

    calculate the percent KBr in a solution containing 0.88 grams KBr per 800 mL solution.
  54. chemistry

    To what final volume should you dilute 50.5ml of a 4.75 M KI solution so that 27.5ml of the diluted solution contains 3.10g of KI
  55. Chemistry

    1.000 grams of KHP consumed 43.3 mL of KOH solution. What is the molarity of the KOH solution?
  56. science

    If you have 0.50M Ca(NO3)2 solution, how many mL of this solution must be evaporated to obtain 32.8 grams of solid Ca(NO3)2?
  57. chemistry urgent

    if 500 ml of HCl solution is needed to react with 2.43 g of Mg, what is the molarity of the HCl solution?
  58. chemistry

    It takes 62 mL of 0.124 M KOH to neutralize46.7 mL of H2SO4 solution. What is the concentration of the H2SO4 solution?
  59. lab

    show me how to answer a question like this A chemical solution contains 40% grain. How much grain is in 35.5ml of a solution
  60. Chemistry

    How many mL of a stock 2.50M HCl solution are required to prepare 25.0 mL of a 0.15M HCl solution?
  61. chemisty

    how many mL of a stock 2.50M HCI solution are required to prepare 25.mL of a 0.15M HCI solution?
  62. chemistry 105

    to what volume should you dilute 20 mL of a 10 M H2SO4 solution to obtain a 0.130 M H2SO4 solution?
  63. chemistry 105

    to what volume should you dilute 20 mL of a 10 M H2SO4 solution to obtain a 0.130 M H2SO4 solution?
  64. math

    the lab keeps two acid solutions on hand. one is 20% and the other is 35%. how much 20% and how much 35% acid solution should be used to prepare 25 liters of a 26% solution?
  65. Chemistry

    suppose you added 26.0 ml of 0.01 M NaOH to the solution, what is the molarity of excess NaOH in the mixture? what is the ph of this solution?
  66. Algebra

    Is(0,3) a solution to the equation y=x+3 A. Yes B. No*** Is (1,4) a solution to the equation y= -2x A. Yes*** B. No Look at the following points (4,0) (3,1) (6,3) (2,-4) Which are the solutions to y= x-4? Choose all the correct answers A.(6,3) B.(4,0)***
  67. arif

    when I tried to find solution of 1/(x-3) + 1/(x-9) = 1/(x-2) + 1/ (x-8) all terms of x are cancelled out why? Is there any rule to find solution of this?plz guide me.
  68. math

    The IV dose of mannitol is 1.5g/kg, administered as a 15% solution. How many mls of the solution should be administered to a 150lb patient?
  69. chemistry

    to what volume should you dilute 0.100L of a 15M NaOH solution to obtain a 1.0M NaOH solution
  70. math

    How many grams of water are needed to reduce 100g of a 30% acid solution to a 10% acid solution?
  71. math

    Solve the system by elimination. State whether the system has one solution, infinite solutions, or no solution. x + 3y = –5 4x – y = 6 please help thanks
  72. Chemistry

    An aqueous solution is 0.257 m NaOH. What are the boiling point and freezing point of this solution?
  73. Math

    Please check my answers 1. Which ordered pair is a solution of y=x-4? My answer is B (0, -3) 4.Which equation has (2,-1) as a solution My answer is D y=-2x+1
  74. chemistry

    i need to prepare 25.00 mL of a solution of a certain vitamin at a concentration of 2.00 mg/ml. how do i find the weight of the vitamin needed in the solution
  75. algebra 1

    is (0.3) a solution to the equation y=x+3? yes no** is (1,-4) a solution to the equation y= -2x yes** no look at the following points (4,0) , (3,-1) ,(6,3) , (2,-4) which are solutionns to y=x -4? choose all correct answers (6,3)** (3,-1) (2,-4) (4,0)**
  76. chemistry

    What is the concentration of this solution? If you added 10mL of water to the 10mL of 0.010M CaCl2 solution.
  77. chemistry

    What is the pH of a solution prepared by dissolving 6.0 g of HCl in water to make 415 mL of HCl solution?
  78. Chemistry

    A solution contains 14% by mass of h2so4.find the number of moles of h2so4 in 155g of solution
  79. Algebra

    Find the y- and x-intercepts for the equation. Then graph the equation. Does y come first in the solution? I figured that: the first solution is (0,-3) is this correct? and is x = to {3/7,0}? Thanks! f(x) = - 3 - 7x
  80. mathematical physics

    Show that :(i) u=e^xsiny is a solution of Laplace's equation. (ii) u= x^2+t^2 is a solution of the wave equation.
  81. math help :)

    the lab keeps two acid solutions on hand. one is 20% and the other is 35%. how much 20% and how much 35% acid solution should be used to prepare 25 liters of a 26% solution?
  82. Chemistry...Help!!

    To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ?
  83. mathematical physics

    Show that: (I) u = e^xsiny is a solution of Laplace's equation. (ii) u = x^2+t^2 is a solution of the wave equation.
  84. math

    How many liters of water must be added to 10L of a 95% solution of ammonia to make a solution that is a 50% ammonia?
  85. chemistry

    To what volume should you dilute 60mL of a 12.0M H2SO4 solution to obtain a 1.85M H2SO4 solution?
  86. chemistry

    explain how you would make the following solution. You should tell how many grams of the substance you need to make the solution, not how many moles. 2L of 6M HCl
  87. Algebra 1a

    Solve the following system of equations. x+3y=6 x=8-3y What is the solution of the system? Type the ordered pair or indicate if there is no solution. Thank you very much
  88. College Algebra

    Please, I need your help!How much water must be evaporated from 16oz of a 2% salt solution to make a 4% salt solution?
  89. chemistry

    If 17.5 mL of 0.553 M KOH is needed to neutralize 25.0 mL of an HBr solution what is the molarity od HBr solution
  90. algebra

    How much water mest be added to 6 ounces of a 20% acid solution to obtain a 15% acid solution?
  91. algebra

    solve the equation(enter solution from smallest to largest. if there no solution enter none) 4x^2=15x+4
  92. Math

    How much water mest be added to 6 ounces of a 20% acid solution to obtain a 15% acid solution?
  93. chemistry

    If 24.7 of 0.250 M NaOH solution are needed to neutralize 19.8 mL of H2SO4 solution, what is the molarity of the H2SO4?
  94. mathematical physics

    Show that :(I) u = e^xsiny is a solution of Laplace's equation. (ii) u = x^2+t^2 is a solution of the wave equation.
  95. science

    25.0 mL of an unknown HCl solution is titrated with 17.5 mL 0.100 M NaOH. What is the Molarity of the HCl solution?
  96. Chemistry

    A 15.0 mL sample of 0.250 M H2SO4 is neutralized by 20.5 mL of KOH solution. What is the molarity of the KOH solution?
  97. Chemistry

    Describe how to make 2.5L of 0.1M HCL solution from 12M HCL concentrated solution and water. Thank you
  98. algebra

    How many kilograms of water must be evaporated from 10kg of an 8% salt solution to produce a 25% salt solution
  99. mathematical physics

    Show that : (I) u = e^xsiny is a solution of Laplace's equation. (ii) u= x^2+t^2 is a solution of the wave equation.
  100. algebra

    How many kilograms of water must be evaporated from 10kg of an 8% salt solution to produce a 25% salt solution