Suppose you are to prepare 1 liter of 70% ethyl alcohol.What is the ratio needed to prepare the solution?

50,638 results

  1. KSU

    Suppose you are to prepare 1 liter of 70% ethyl alcohol.What is the ratio needed to prepare the solution?
  2. Chemistry

    How would you prepare a 25.0% water in ethyl alcohol solution using 100.0 ml of ethyl alcohol (The density of ethyl alcohol is 0.7893 g/ml)
  3. chemistry

    how many grams of ethyl alcohol are needed to produce 1 L of a 2 mM solution if 1 mole =46g of ethyl alcohol. how do you calculate?
  4. att DR BOB

    let me rephrase my question. A Mole of ethyl alcohol weights 46g.How many grams of ethyl alcohol are needed to produce 1 L of a 2 milimolar solution? I know the answer is 0.092g but I don't know how to derive it
  5. Math

    Suppose you have two alcohol+water solutions. One solution ( of volume x liter ) is 45% alcohol, while the second solution (of volume y liter) is 75% alcohol. What values of "x" and "y" (in liters) will fill a total volume of 5.0 liter which contains 2.88 liters of alcohol ? I...
  6. Chemistry

    An aqueous solution of ethyl alcohol is made by transfering 1.32 mL of liquid ethyl alcohol to a 50.0 mL volumetric flask, and then adding enough water to fill the flask to the mark. What is the volume/volume percentage of ethyl alcohol in the solution?
  7. Chemistry

    Ethyl alcohol which is prent in many beverages molecular formular C2H6O.If 9.2g of ethyl alcohol are available.Calculate number of molecular of ethyl alcohol 9.2g of ethyl alcohol.
  8. Physics

    The frequency of a light wave is the same when the light travels in ethyl alcohol or in carbon disulfide. Find the ratio of the wavelength of the light in ethyl alcohol to that in carbon disulfide. The refractive indices n of carbon disulfide and ethyl alcohol are n(disulfide...
  9. Chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.500 mole of ethyl alcohol. If the vapor pressures of ethyl ether and ethyl alcohol at 20 oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20 oC (assuming ideal behavior) is:
  10. Chemistry

    Can someone please check my work? Calculate the mass of (NH4)2S2O8 needed to prepare 250mL of a 0.100M solution. I got 5.705 g. Calculate the volume of 2.00M KI needed to prepare 250mL of a 0.200M solution. I got 0.025L or 25mL. Calculate the volume of 0.100M Na2S2O3 needed to...
  11. Chemistry

    Calculate mass of silver nitrate needed to prepare a solution of concentration 0.01 moles per liter.
  12. Inorganic Chemistry

    Methyl Alcohol (CH3OH) and ethyl alcohol (C2H5OH) form ideal solutions at 50°C, the vapor pressure of pure methyl alcohol is 0.529 atm, and the vapor pressure of pure ethyl alcohol is 0.292 atm. What is the vapor pressure at 50°C of a solution containing 24.00 g of methyl ...
  13. chemistry

    When 25 mL of C2H5OH (density 0.80 g.cm-3) is dissolved in water to prepare a 250 mL solution, the density of the solution was found to be 0.950 g.cm-3. Calculate a. Molarity of pure ethanol; b. Molarity of ethanol in the final solution; c. Volume of the final solution which ...
  14. chem 2

    solution is made by adding 0.100 mole of ethyl ether to 0.350 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20°C are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20°C (assuming ideal behavior) is:
  15. Chemistry

    how to prepare 100cm3 of 1.0moldm3 copper sulphate and from this prepare 100cm3 of 0.1 moldm3 solution.similarly use the 0.1moldm3 to prepare a 0.05 moldm3 ,and the 0.05moldm3 solution to prepare 0.01 moldm3 and 0.001moldm3solution.
  16. science

    2. Alex, a fresh graduate chemical engineer, started his job by a mission requested by his boss. He was supposed to prepare a small amount of ethylene in the lab, to use it later for polyethylene synthesis. His boss, OE, also known as “The Monster” did not provide him any ...
  17. Chemistry

    A student intend to prepare 200ml of 0.3M NaCl solution . The mass in gram of NaCl needed to prepare solution is ?!
  18. Algebra 2

    a chemistry lab assistant wants to prepare 10 liters of 48% acid solution. in stock he has 80% and 40% acid solutions. how many liters of each in stock solution should he mix to prepare a 10-liter mixture?
  19. Chemistry - %v/v

    1. How many mL of acetone are needed to prepare a 10% v/v solution in 500 mL of methanol? 2. If a 500mL solution of n-propanol in water is prepared with 4mL of alcohol, what is the concentration of alcohol in % v/v? I've never worked with %v/v before so I'm not sure if I ...
  20. chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is: Answer
  21. chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is: Answer
  22. college chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is:
  23. Physics

    Suppose that the amount of heat removed when 2.9 kg of water freezes at 0.0 oC were removed from ethyl alcohol at its freezing/melting point of -114.4 oC. How many kilograms of ethyl alcohol would freeze? I don't know where to start with this question! Please help.
  24. Chemistry

    One liter of 70% alcohol is needed. How much 95% alcohol is required to make the 70% solution. And thank you for last question and any future ones.
  25. Chemistry

    One liter of 70% alcohol is needed. How much 95% alcohol is required to make the 70% solution. And thank you for last question and any future ones.
  26. Chemistry

    How many grams of CaCl2 are needed to prepare 25.0 mL of .500 M solution? and What volume of 12.00 M HCL is needed to prepare 150.0 mL of .500 M HCL?
  27. chemistry

    You wish to prepare 100.0 mL of a 800.0 ppm w/v sodium (MW = 22.9897 g/mol) solution. How many grams of sodium dichromate dihydrate (Na2Cr2O7·2H2O, MW = 297.998 g/mol) are needed to prepare this solution?
  28. chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC
  29. chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC
  30. organic chemistry

    Consider the crystallization of sulfanilamide from 95% ethyl alcohol. If impure sulfanilamide is dissolved in the minimum amount of 95% ethyl alcohol at 40°C rather than 78°C (the boiling point of ethyl alcohol), how would this affect the percent recovery of pure ...
  31. Organic Chemistry

    Consider the crystallization of sulfanilamide from 95% ethyl alcohol. If impure sulfanilamide is dissolved in the minimum amount of 95% ethyl alcohol at 40°C rather than 78°C (the boiling point of ethyl alcohol), how would this affect the percent recovery of pure ...
  32. Chemistry

    How many moles of potassium sulfate would you need to prepare 1200 grams of 5.0% sulfate (m/m) solution? Calculate the volume of solution of 3.6 NH4CI needed to prepare 350.0ml of 1.24 M NH4CI. How many grams of ammonium chloride are in the solution you created in the above ...
  33. Great Valley

    How many moles of potassium sulfate would you need to prepare 1200 grams of 5.0% sulfate (m/m) solution? Calculate the volume of solution of 3.6 NH4CI needed to prepare 350.0ml of 1.24 M NH4CI. How many grams of ammonium chloride are in the solution you created in the above ...
  34. chem 1151

    a 250.0 mL of solution contains 50.0 mL acetone and 45.0 mL ethyl alcohol and the remainder water. Calculate the % acetone, % ethyl alcohol, and water in the solution. Show calculations.
  35. Chemistry

    If a solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC ..is how many torr?
  36. chemistry

    how wold you prepare 2.00L of 1.00M HCl solution using 6.00 M HCl? i already found the volume of 6.00M HCl needed to be .333L. i am confused about how to actually prepare the solution. do i used a volumetric flask or any other glassware?
  37. physics

    Brandy is made by distilling ethyl alcohol, which is done by boiling the alcohol until it turns into a gas. How much heat is required to completely distil 0.750 kg of ethyl alcohol?
  38. physics

    Brandy is made by distilling ethyl alcohol, which is done by boiling the alcohol until it turns into a gas. How much heat is required to completely distil 0.750 kg of ethyl alcohol?
  39. Math

    A pharmacist is to prepare a 50 fluid ounce solution that contains 54% glucose. The pharmacy has a 30% solution and a 90% solution on hand. How many ounces of each solution should be mixed to prepare the desired perscription?
  40. Chemistry

    In the laboratory you will be provided with a 1.0 x 10-5 M primary stock solution of fluorescein (MW=332.31g/mol). The calibration curve should include a blank, 0.025, 0.05, 0.075, 0.10, 0.15, and 0.25 micromolar fluorescein solutions. Since you will be using 25 mL volumetric ...
  41. physics

    Suppose the amount of heat removed when 3.0kg of water freezes at 0 degree C were removed from ethyl alcohol and its freezing/melting point of -114 degree C. How many kilograms of ethyl alcohol would freeze? PLEASE GIVE ME SOME HINTS!!!THANKS A LOT!!!!
  42. physics

    i figured out the ratio its 1.10 , don't know how to get the second part please help!! my understanding is not good enough to answer part 2 Pretend you have two containers, one filled with ethyl alcohol and the other filled with benzene. How would you show the distance light ...
  43. Chemistry

    Q. How much of 80% alcohol should b mixed with 30ml of 95% alcohol in order to prepare 90% alcohol?
  44. science-chem

    first, thanks so much Bob for helping me!!!! Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M NaCl/L)*(58.5g NaCl/1mole NaCl)=0.278 g NaCl...
  45. chemistry

    Since October 2004, Jack Daniels Tennessee whisky, produced in Lynchburg, TN, has been bottled at 80 proof (40% alcohol by volume). Given that the density of ethyl alcohol is 0.789 g/cm3, and that of water 1.00 g/cm3, calculate the concentration of the alcohol in (a) percent ...
  46. CHEMISTRY

    How many mL of pure isopropyl alcohol is needed to prepare 250 mL of 70% isopropyl alcohol (C3H7OH). I'm thinking if i should use vol of solute/vol of sol'n but it doesn't fit the formula and im confuse it. please help me
  47. Organic Chemistry

    We used sodium dichromate in sulfuric acid to oxidize borneol to camphor. Suppose you needed to prepare benzaldehyde from benzyl alcohol. Would the sodium dichromate be the best choice for this oxidation or are there better choices? Explain.
  48. science

    Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M NaCl/L)*(58.5g NaCl/1mole NaCl)=0.278 g NaCl....is that right? someone just replied it was...
  49. Chemistry

    I need help on this stoichiometry problem. I don't know whay my answer is incorrect. The fermentation of sugar to produce ethyl alcohol occurs by the following reaction: C6H12O6 -- 2C2H5OH + 2CO2 What mass of ethyl alcohol can be made from 1.00 kg of sugar? I keep getting 1012...
  50. physical science

    Since October 2004, Jack Daniels Tennessee whisky, produced in Lynchburg, TN, has been bottled at 80 proof (40% alcohol by volume). Given that the density of ethyl alcohol is 0.789 g/cm3, and that of water 1.00 g/cm3, calculate the concentration of the alcohol in (a) percent ...
  51. Chemistry 106

    How would you prepare 1.00 liter of a 0.18 M solution of NaOh?
  52. chemistry laboratory

    1. prepare a buffer solution by using acetic acid and sodium acetate.2. prepare M/40 NAOH solution.
  53. Science

    A solution made up of 20ml of mythl alcohol and 50ml of water. What is the volume percent of ethyl alcohol in solution.
  54. chemistry

    What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7e-4.
  55. algebra

    A chemistry lab wants to prepare 300 liters of 25% acid solution. In stock he has 20% and 35% acid solutions. How many liters of each in stock mixture should he mix tp prepare a 300-liter mixture?
  56. CHEMISTRY

    DESCRIBE BRIEFLY HOW U WOULD PREPARE ONE LITER OF 0.1 NaOH SOLUTION
  57. chemistry

    what is the height of the ethyl alcohol that exactly fills a 200.0mL container? the density of ethyl alcohol is 0.789/mL
  58. science

    what is the weight of the ethyl alcohol that exactly fills a 200.00 ml container? The density of ethyl alcohol is 0.789 grams/ml
  59. chemistry

    Ethyl alcohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 J of energy?
  60. Science

    What is the mass of ethyl alcohol that fills a 0.200 L container? The density of ethyl alcohol is 0.789 g/mL.
  61. Chemistry

    My chemistry is bad. I know these are very easy but I cannot solve them . 1. a) Prepare 200 ml of 2 M HCl solution from stock bottle containing 37% w/w HCl and d = 1.2 (g/ml). MWHCl = 36.5 g b) Calculate M of 37% w/w HCl solution? d= 1.2, then solve the above problem 2. a) ...
  62. Chemistry

    Consider a 9% by mass aqueous ethyl alcohol solution. a.) Calculate the molality of this solution_____m b.) Given that ethyl alcohol is a molecular solute, calculate the freezing point of this solution. ________ degrees Celsius. c.) Consider the boiling point of each solution...
  63. chemistry

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  64. CHEM

    How many grams of sodium chloride are required to prepare 1.00 liter of a 1.00M NaCl solution?
  65. Chemistry

    How many grams of NaNO2 must be added to 1 liter of 1.00 M HNO2 solution in order to prepare a buffer solution with pH = 4.14? pH = 3.14? My work: ka = pH(buffer ratio) 4.5 * 10^-4 = 1.000*10^-4.14 (x M of base/1.00 M of acid) x = 6.21 6.21 M = (6.21 moles/1 L)(1 L) = 6.21 ...
  66. Chemistry

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  67. Chemistry

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  68. Chemistry

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  69. ap chemistry

    What is the ratio of the molarities of PO3^4- and HPO4^2− ions in a buffer solution having a pH of 13.16? What mass of K3PO4 must be added to 1 L of 0.1 M K2HPO4(aq) to prepare a buffer solution with a pH of 13.16? Answer in units of g What mass of K2HPO4 must be added ...
  70. chemistry

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  71. Chemistry

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  72. Chemistry

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  73. Chemistry

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  74. medicine

    how can i solve this?prepare 150ml of a 7.5%dextrose sol.you have D5%W and D10%W. how much of each sol. is needed? I assume the 7.5 dextrose is going to be on a w/w basis also. This is really simple, no algebra needed. Since 7.5 is halfway between 5 and 10, use equal volumes ...
  75. Chemistry

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  76. chemistry

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  77. Chemistry

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  78. chemistry

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  79. chemistry

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  80. Chemistry

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  81. chemistry

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  82. chemistry

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  83. Chemistry

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  84. chemistry

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  85. Biology

    You need to prepare 270ml of a 20% sucrose solution (w/v). Sucrose has a molecular formula of C12H22O11. How would you prepare this solution?
  86. Chemistry

    2)How to prepare 5.6 liter of 50 mM NaCL solution (mol wt 58.44) using 10% NaCL stock solution?
  87. Science, chem

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  88. Chemistry

    We are asked to prepare a 100 ml solution with the following 3 concentrations: 53.00 mg/ml sodium salicylate, 0.020 M FeCl3, and 0.050 M HCl. Then, we are going to take the absorbance at 520 nm. What is the best way to prepare the 100 ml solution ?
  89. chemistry

    PLEASE SHOW PROCEDURE! You wish to prepare an aqueous solution that has a freezing point of -0.100 degrees Celsius. How many milliliters of 12.0 M HCl would you use to prepare 250.0 mL of such a solution? [Hint: Note that in a dilute aqueous solution, molality and molarity are...
  90. Chemistry

    How would you usually prepare starch indicator solution for iodine titrations? Can the solution be stored for a few months in the fridge? I noticed that sometimes the starch indicator solution in the fridge has turned cloudy, in which case we should prepare a new solution?
  91. Chemistry

    calculate the mass ratio of 25% cacl2 solution and water to prepare 500 g of a 5% salt solution
  92. Science ms. Sue please help!

    How would you prepare 100.0 mL of 0.07500 M AgNO3 solution starting with pure solute? 2. An experiment calls for you to use 250 mL of 1.0 M HNO3 solution. All you have to available is a bottle of 6.0 M HNO3. How would you prepare the desired solution?
  93. chemistry

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  94. chem

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  95. Organic Chemistry

    I have already calculated the volume of ethyl alcohol need to dissolve 0.300 g of sulfanilamide at 78 degrees Celsius. I got 1.429 mL ethyl alcohol. My question is: how do I calculate how many grams of sulfanilamide will remain dissolved in the mother liquor (ethyl alcohol) ...
  96. Biochem

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  97. chemistry

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  98. Pharm Tech

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  99. Chemistry

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  100. chemistry

    B-Mercaptoethanol is available as a 98% (w/w) solution, sp gr 1.114. What voulume is needed to prepare 0.100 L of a 50.0 mM solution. fw=78.13
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