calculate the normality of 5.56 grams of K2Cr2O7 dissolved in 500 mL

46,305 results
1. Chemistry

1. What is the percent by mass of a solution that contains 50 grams of solute dissolved in 200 grams of solution? What is the concentration of the same solution in parts per million? 2. What is the percent mass of a solution that contains 75 grams of salt

2. Chemistry (Regents level)

1- In the reaction Fe2O3 + 3 CO = 2 Fe + 3 CO2, what is the total number of moles of CO used to produce 112 grams of iron? a) 1.0 b)2.0 c)3.0 d)4.0 2- Given the reaction: 4Al + 3O2 = 2Al2O3 How many moles of Al2O3 will be formed when 27 grams of Al reacts

3. chemistry (quatatative analysis)

How many grams of Ba(IO3)2 can be dissolved in 500 mL of a 0.100 M KIO3 solution at 25 oC? Use activities for this calculation. The solubility product constant for Ba(IO3)2 is 1.57×10-9 at 25 oC.

4. chemistry

1) If 358 g of KNO3 are dissolved in 650 mL of water at 80°C, at what temperature will solid settle out when it is cooled? 2) Give 2 ways, quantitatively, that a solution of 80 g of NaNO3 in 100 mL of water at 70°C can be made saturated. 3) If 100 g of

5. chemistry again

calculate the normality of a solution prpared by dissolving 220.0 mg of K2Cr2O7 in 100 ml solution that will be used to oxidize ferrous chloride according to the unbalanced reaction.

6. Chemistry

(1)Make 500 ML of 4N H3PO4. How many grams will be needed? (2) In a titration procedure, 20mL of 2N solution were required to titrate 5mL of an unknown solution. What is the normality of the solution? (3) How much of a 0.01M can be made from 20mL of 6M

7. soran university

1. Which salt is LEAST soluble at 0 ºC? 2. How many grams of sodium nitrate, NaNO3, are soluble in 100 g of water at 10 ºC? 3. When 50 grams of potassium chloride, KCl, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described

8. physical science

how much sugar is dissolved in 500 grams of a solution if the solution is 70 percent sugar by mass? Also, What is the concentration of a solution that contains 45 grams of sugar in 500 grams of solution? thank you

9. General Chemistry

Eugenol is the active ingredient in the oil of cloves used to relieve toothache. Calculate the boiling point of a solution in which 0.17 grams of eugenol, (C10H12, O2) is dissolved in 10.0 grams of benzene. (Kb benzene= 2.53 0C/m; Tb(solvent) = 80.10 0C)

10. Analytical chemistry

1. A solution of 0.010 M K2Cr2O7 with a volume of 60.00 mL reacts in a titration reaction with 20.00 mL of FeSO4 in sulphuric acid. Calculate the normality of FeSO4. 6Fe 2+ + Cr2O7 2- + 14 H

11. chem 2

what is the mass of F in grams in 24.6 grams of SnF2? Convert 24.6 g SnF2 to mols SnF2. Convert mols SnF2 to mols F atoms. Convert mols F atoms to grams F atoms. 24.6 g SnF2*(1 mol SnF2/molar mass SnF2)*(2 mols F/1 mol SnF2)*(atomic mass F/1 mol F Atoms) =

12. Chemistry

You have 500 mL of a 5.0 M solution of nitric acid HNO3 (63.01 g / mol) dissolved in water. How many grams of nitrogen does the solution contain?

13. AP Chemistry

(DrBob222 please help me) A sample of 1.97 grams of Z is dissolved into 500 grams of water which is in a styrofoam coffee cup. The temperature is monitored and is found to rise from 25.015◦C to 25.484◦C. What is ∆Hsolution for substance Z? Assume no

14. Analytical Chemistry

Calculate the number of grams needed to be dissolved and diluted to 100 ml to prepare 0.200M solution for the following substance BaCrO4. huh?

15. Chemistry

A 15.0 mL sample of whiskey was diluted to 500.0 mL. A 3.00 mL aliquot of the diluted sample was removed and the ethanol, C2H5OH, was distilled into 50.00 mL of 0.02400 M K2Cr2O7 and oxidized to acetic acid. The excess Cr2O72– was then back titrated with

16. science

20 g of K3PO4 dissolved in 350 ml water,to come up with 500 ml solution. calculate : molecular weight Equivalent weight molarity normality molality

17. Chemistry

How many grams of K2Cr2O7 (Potassium dichromate) must be used to make 250 ml of a0.125 M solution?

18. chemistry

I need a formula for: 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution. next 0.5 grams of sodium chloride is dissolved to make 0.05 ml of solution. next 670 grams of Pb (C2H3O2)4 are dissolved to make 3.5 ml of solution.

19. Analytical chemisty

How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?

20. Chemistry

I have a test tommorow and I forgot how to do this: Caculate mass of Cr in 548g of K2Cr2O7. I remember putting 548g K2Cr2O7 (1 mol K2Cr2O7/294.2 g K2Cr2O7) then from there I forgot. I got 96.85 g Cr but that does not seem right. Could someone please tell

21. Chemistry

Ferrochrome is an alloy of iron and chromium. Ferrochrome can be dissolved in dilute sulfuric acid to produce a mixture of FeSO4 and Cr2(SO4)3. The FeSO4 reacts with K2Cr2O7 in acid solution according to the following equation. 14H+ + 6Fe2+ + Cr2O7 2–

22. thermodynamics?

calculate the number of grams of glycerol, C3H5(OH)3 (MW=92.1 g/mol), that must be dissolved in 520 grams of water to raise the boiling point to 102.00 degrees Celsius. this whole chapter really lost me. delta T = Kb*molality delta T = 2 degrees. Kb =

23. chemistry

A compound was found to be composed of the following amounts of elements: 20.00% wt% C, 26.64wt% O, 46.65 wt%N, and 6.71wt%H. A 6.125 grams sample of this compound dissolved in 46.205 grams of water as a solution was found to have a freezing point of

24. Chemistry 12

calculate the Ph of a solution composed of 0.75 grams of KOH dissolved in 500ml of water. assume total ionization.

25. Chemistry

Calculate the osmotic pressure of this solution. 18..6 grams of solute with molecular mass of 8940 grams are dissolved in enough water to make 1.00 dm3 of solution at 25 celsius. What is the osmotic pressure of the solution?

26. chemistry

calculate the normality of 5.56 grams of K2Cr2O7 dissolved in 500 mL

27. analytical chemisty

Consider the standardization of a solution of K2Cr2O7 with iron metal according to the following: Reaction: Fe + Cr2O7-2 → Fe +3 + Cr+3a. How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution? What is the exact normality of the

28. chenistry

Calculate the molarity of the following. 45 grams of Na2SO4 dissolved to make 500 ml of solution 30 grams of C4H8O4 dissolved to make 450 ml of solution

29. Analytical chemistry

a solution of 0.010M K2Cr2O7 with a volume of 60.00ml reacts in a titration reaction with 20.00ml of FeSO4 in sulphuric acid. Calculate the normality of FeSO4.

30. chemistry

The amount of Fe in a 2.0008 g sample of an iron ore was determined by a redox titration with K2Cr2O7. The sample was dissolved in HCl and the iron brought to a +2 oxidation state. Titration required 26.48 mL of 0.034 M K2Cr2O7. Calculate the iron content

31. chemistry

1.7g of sodium oxalate was dissolved in 250ml of distilled water. Calculate the molarity and normality of the solution

32. Chemistry

A solution of sodium carbonate contains 1.06g of Na2CO3 dissolved in 100ml of water. Calculate its concentration in normality. (d=2.54g/ml)

33. chemistry

The left side of a balanced chemical equation is shown below: K2Cr2O7 + 4H2SO4 + 3SeO2 If 0.600 moles of K2Cr2O7, 2.800 moles of H2SO4 and 1.500 moles of SeO2 are brought together and allowed to react, then

34. chemistry

calculate the freezing point of an aqueous solution of 15.5 grams of glucose dissolved in 150 grams of water

35. chemistry

calculate the molarity and normality of a solution containing 4.0 g NaOH in 500 cm3 solution

36. Science

Which of the following solutions would have the highest boiling point? (1) 5 liters of water (2) 5 grams of salt dissolved in 4 liters of water (3) 10 grams of salt dissolved in 3 liters of water (4) 15 grams of salt dissolved in 2 liters water (5) 20

37. CHEMISTRY

GIVEN A 30G OF ALCL3 DISSOLVED IN 250G OF WATER TO CME UP WITH 400ML SOLUTION WHAT IS THE NORMALITY ?

38. Chemistry

A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting

39. Chemistry

If 33.6 grams of KCl are dissolved in 192 grams of water, what is the concentration of the solution in percent by mass? AND if 2.1 moles of CaCl2 are dissolved in enough water to make a .92 liter solution what is the resulting molarity? Please help and

40. chemistry

what is the minimum temperature needed to dissolve 60 grams of K2CR2O7 in 100 milliliters of water?

41. Chemistry

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?

42. chemistry

To prepare the titrant fo amonia nitrogen analysis an analyst weight out 1.20 grams of concentration 98% sulfuric acid and brings to 1000 ml in lab pure water. if the molecular weight is 98 calculate the normality of the solution this analyst has prepare.

43. chem

Calculate the boiling point elevation of a solution containing 50.0 g of glucose dissolved in 500.0 g of water? We just started learning about this and i don't get it!

44. chemistry

How many grams of H2SO4 are contained in 4.5 L of .30N (N standing for normality) sulfuric acid? Help would be much appreciated.

45. chemistry

The boiling point of diethyl ether, CH3CH2OCH2CH3, is 34.500 °C at 1 atmosphere. Kb(diethyl ether) = 2.02 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.85 grams of the compound were dissolved in 283.2 grams

46. organic chemistry

If 5 grams of diphenylacetylene is dissolved in 40 ml cyclohexene, calculate the pressure change needed to completely hydrogenate this substance at room temperature and 50 degrees celcius.

47. AP Chemistry

Determine the pH of the following solutions. 1) 0.600 M HCl 2) 0.052 moles of H2SO4 dissolved in 4.2 L of water. 3)5.6 grams HNO3 dissolved in 450 ml of water. 4) 2.5 grams of NaOH dissolved in 500 mL of water. 5) adding 2 grams NaH dissolved in 0.56 L of

48. AP Chemistry

Determine the pH of the following solutions. 1) 0.600 M HCl 2) 0.052 moles of H2SO4 dissolved in 4.2 L of water. 3)5.6 grams HNO3 dissolved in 450 ml of water. 4) 2.5 grams of NaOH dissolved in 500 mL of water. 5) adding 2 grams NaH dissolved in 0.56 L of

49. Analytical chemistry

an 0.5031 gram sample of iron ore is determined through redox titration using K2Cr2O7. The sample was dissolved in HCl and all the iron was converted to the 2+ state. Titration to the endpoint required 24.34 mL of 0.01887 mol/L K2Cr2O7. Calculate the

50. Chemistry

What is the molarity and normality of 100.3 grams of calcium hydroxide dissolved in 775 ml of water?

51. Analytical Chemistry

A 10.0 mL sample of whiskey was diluted to 500.0 mL. A 4.00 mL aliquot of the diluted sample was removed and the ethanol, C2H5OH, was distilled into 50.00 mL of 0.02150 M K2Cr2O7 and oxidized to acetic acid. The excess Cr2O72– was then back titrated with

52. Chemistry

Calculate the [H3O+] when 1.65 grams of KOH are dissolved in 500.0 mL of solution

53. Chemistry

What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6

54. Chemistry

Please sir solve this... 6.3 gm of oxalic acid (eq. Wt.=63) is dissolved in 500 ml solution what will be the normality of the solution?

55. qualitative chemistry

calculate the percent w/v, mole fraction of components, molarity and normality of the solution containing 13 g nahso4 dissolved in water upto total volume of 250 ml

56. Chemistry College Level

Ok, so here's my question: If exactly 14.563 grams of KMnO4 were dissolved to yield 750 mL of solution waht would be the normality of the KMnO4? From a previous question (that this question says to refer to) we have: MnO4- +8H+ +5e --> Mn2+ +4H2O I'm not

57. chemistry

I was given the following problem: what is the normality of a solution containing 6 grams of H2SO4 in a 200ml solution? my teacher obtained a normality of 39normals while I took into account that I had two hydrogen free and obtained a result of 0.6 N,

58. Math

What is the molarity of 83.0 grams of KI dissolved in 500.0 ml of water

59. chemistry

calculate grams of potassium bromide dissolved in 50 grams of water at 0 celcius

60. Science

What is the percentage purify if 20.5gm/litre is completely dissolved into N/29 K2Cr2O7

61. chemistry

calculate the molarity and normality of a solution containing 4.0 g NaOH in 500 cm3 solution?

62. chemistry

A solution containing 4.5 grams of non-electrolyte dissolved in 125 grams of water freezes at -0.372 degrees. Calculate the molar weight of the solute.

63. Chemistry

A 1N solution of NaOH is diluted 4/20 then rediluted 1:50. What is the final normality? How many grams of NaOH are present in 100ml of the final solution? I sort of understand the basic concept, but I don't really know how to do normality problems.

64. Science

What is the percentage purity if 20.5gm/litre of mohr's salt is completely dissolved into N/20 K2Cr2O7

65. Chemistry!

0.0100 Ba(OH)2 is dissolved in water to give 500.0 mL of solution calculate OH- concentration would it be the molarity of Ba(OH)2 (0.0100 / 0.500) multiplied by two because there is twice as much OH??

66. Chemistry

What is the freezing point of a solution that contains 3.5 mol of the ionic solid BaCl2 dissolved in 500 grams of water?

67. Science

. What is the freezing point of a solution that contains 3.5 mol of the ionic solid BaCl2 dissolved in 500. grams water?

68. science

When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these

69. science

When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these

70. Chemistry

A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting

71. Analytical chemistry

A 5ml portion of table wine was diluted to 100 ml in a volumetric flask. The ethanol in a 20 ml aliquot was distilled into 100 ml of 0.05151M K2Cr2O7. heating completed oxidation of the alcohol to acetic acid: Ch3Ch2OH + 2Cr2O7(2-) +16H(+) -> 3Ch3COOH +

72. Chemistry

"Determine the volume of a 0.925M K2Cr2O7 solution required to completely react with 5.28g of Cu." My attempted method for solving was to convert the 5.28g of Cu to moles, find moles of K2Cr2O7 using the mole to mole ratio, and then use M=mol/L to solve

73. Chemistry

"Determine the volume of a 0.925M K2Cr2O7 solution required to completely react with 5.28g of Cu." My attempted method for solving was to convert the 5.28g of Cu to moles, find moles of K2Cr2O7 using the mole to mole ratio, and then use M=mol/L to solve

74. chemistry

A 275 mL sample of 1-propylamine vapor (in equilibrium with the liquid) at 25 °C is removed and dissolved in 0.500 L of H2O. For 1-propylamine, Kb = 3.72 x 10-4 and the vapor pressure at 25.0 °C is 316 Torr. a. What should be the pH of the aqueous

75. chemistry

A certain substance has a solubility of 12 grams in 100 grams of water at 20°C. This means that _____ the substance will begin to dissolve when 12 grams are present in solution when 12 grams of the substance are stirred into a beaker with 100 g of water,

76. chemistry

solution contains 5 grams of of a mixture of sodium hydroxide and sodium sulphate dissolved per 500 ml

77. statistics

the birth of healthy, full term infants in the United States is nearly normally distributed. The mean weight is 3,500 grams, and the standard deeviation is 500 grams. (a) what percentage of the healthy newborns will weigh more than 3,250 grams? (b) what

78. chemistry

what is the minimum temperature needed to dissolve 60 grams of K2CR2O7 in 100 milliliters of water?

79. AP Chemistry

How many grams of benzoic acid, a monoprotic acid with a Ka=6.4x10 to the negative 5, must be dissolved in 500.0 mL of water to produce a solution with a pH=2.50?

80. chemistry

Calculate the concentration in ppm if 8 grams of CaCl2 is dissolved in 250 ml of water.

81. science

Can someone solve these 2 problems for me? 1. When 0.0017 moles of a weak acid are dissolved in enough water to make 0.500 L, the pH of the resulting solution is 5.78. Calculate Ka. 2. A solution is made by dissolving 15.5 g of NaOH in approximately 450 mL

82. Chemistry

Urea, (NH2)2CO, is dissolved in 73.5 g of water. The solution freezes at -0.095°C. How many grams of urea were dissolved to make this solution? (Answer must be in grams)

83. Statistics

The normality of NaOH obtained was 0.0172, 0.0187, 0.0185, 0.189, and 0.0183 N. The theoretical normality of NaOH was 0.02 N. Please calculate: 1) Standard deviation based on the true mean: 2) Standard deviation based on the experimental mean: SD 3)

84. Chemistry Lab

I need help with the third part The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please

85. Chem

Ores are analyzed by dissolving some of the ore and then performing an analysis of a metal (expressed in grams); usually the concentration of the metal is expressed as % of the amount of the ore (in grams) dissolved. An ore containing V was dissolved and

86. chemistry

what is the normality of sodium carbonate of 55 grams in a solution of 4000 ml

87. ap chemistry

A sample of 1.67 grams of Z is dissolved into 500 grams of water which is in a Styrofoam coffee cup. The temperature is monitored and is found to rise from 25.594◦C to 26.041◦C. What is Hsolution for substance Z? Assume no heat is lost/gained by the

88. Chemistry

A sample of 2.08 grams of Z is dissolved into 500 grams of water which is in a styrofoam coﬀee cup. The temperature is monitored and is found to rise from 25.682◦C to 25.899◦C. What is ∆Hsolution for substance Z? Assume no heat is lost/gained by

89. chemistry

If 92.75 mg of Na2CO3 is dissolved in 0.5mL of water, what would be the normality of the solution after the addition of 0.67 mL of water.

90. Chemistry

if 1.25grams of sodium carbonate is dissolved in a 250 centimeter cube. How many grams will be dissolved up to a one molar?.

91. chem

If 5.35 g of KMnO4 are dissolved in a liter of solution, what is the normality of the solution?

92. 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

93. Chemistry

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this

94. Chemistry

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this

95. Chemistry

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this

96. Chemistry

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this

97. Chemistry

3.a solution has 64 grams of HI dissolved in 250 L of water. what is its [H+] 4. What is the pH of the solution in question #3? 5. A solution has 189 grams of HNO3 dissolved in 1000 L of water. What is pH?

98. Chemistry

Calculate the number of moles of solute in 59.23 mL of 0.1455 M K2Cr2O7(aq).

99. Chemistry

Calculate the number of moles of solute in 18.33 mL of 0.1115 M K2Cr2O7(aq)

100. chemistry

Calculate the grams of Ca(OH)2 used to make 500 mL of a 0.150 M solution.