# a density of 1.0 M solution of NaCL

29,680 results, page 79

1. ### chemistry

When a solution of 6M HCl is made from a stock of concentrated HCl by adding an equal volume of water, why is the concentration of the solution only an approximate concentration?
2. ### Intermediate Algebra

if a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. m - 2n = 16, 4m + n = 1
3. ### Chemistry

Find the pH of a solution prepared by taking a 50.0 mL aliquot of a solution prepared by dissolving 12.25g of NaOH and 250.0 mL of water and diluting that aliquot to 1.00L?
4. ### high school chem

How many grams of a stock solution that is 92.5 percent h2s04 by mass would be needed to make 250 grams of a 35% by mass solution?
5. ### chem

A chemistry lab experiment requires 33.3 g of silver nitrate. How many grams of a 14.1% by mass solution of silver nitrate should be used? _________g Solution
6. ### Chemistry

How many milliliters of a 3.85 M solution of Fe2+ are needed to titrate 250.0 mL of a 0.125 M Cro4 2- solution? H + CrO4 2- + Fe2+ yields to Fe3+ + Cr2O3 + H2) (not balanced)
7. ### Chemistry

The solubility of a substance is 12.0 g per 100.0 g of water at 60 C. How many grams of the substance can crystallize from a saturated solution that contains 200.0 g of water at 60 C if the solution is cooled to 20 C?
8. ### chemistry

What is the molarity of each kind of ion in a solution of magnesium chloride that contains 86.0 g of magnesium chloride dissolved in enough water to make 2.37 L of solution? M Mg2+ M Cl-
9. ### Chemistry

1.)Find the PH of a solution with 0.20M NH3 with 0.15M of NH4Cl. 2.)Find PH of a solution with a mixture of 200mL of 0.50M HCHO2 and of 100mL of .50M NaCHO2.
10. ### CHEMISTRY

If 33.7 ml of 0.210 M KOH is required to completely neutralize 27.0 ml of a HC2H3O2 solution, what is the molarity of the acetic acid solution? HC2H3O2(aq)+ KOH(aq)-->KC2H3O2(aq)+H2O(l)
11. ### science

a reference solution is to be prepared with 5PPM parabenzopyrene(252 mol. wt.)the quantity of parabenzopyrene required for preparing one litre 5PPM solution is
12. ### kv

A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is

critical thinking involves:coming up with the best solution, a thought process that is rationallogical &systematic, coming up with the best solution
14. ### chemistry

When 5 grams of salt is dissolved in 95 grams of water the temperature of the solution increases 10°C how much heat is evolved the heat capacity of the solution is 1.1 cal/g°C
15. ### Chemistry Lab

If 3.5 mL of distilled water is added to 1.5mL of a 0.150 M solution of CoCl2, what is the concentration of the resulting solution? M1V1=M2V2 M1= 0.150 V1= 1.5mL M2= 3.5?
16. ### Chemistry 1010

How many grams of Ag2CO3 will precipitate when excess K2CO3 solution is added to 70.0 mL of 0.692 M AgNO3 solution? 2AgNO3(aq) + K2CO3(aq) --> Ag2CO3(s) + 2KNO3(aq)
17. ### science

The dissociation constant of ethanoic acid (ch3cooh) at 298k is 1.8*10^-5 in a buffer solution the concentration of ch3coo and ch3cooh are 0.05m and 0.1m respectively what is the ph of the buffer solution
18. ### Science

A chemistry teacher needs to prepare 750 ml of a 2.5M solution of Potassium iodide for a lab. How many grams of potassium iodide will be needed to make the solution?
19. ### Chemistry

The chemistry problem is "How would you make 500.0 mL of a 3.00 M HCl solution form a stock solution that is 6.00 M?" I have no clue how to even approach this problem.
20. ### Chemistry

When two similar liquids mix to form a solution, the entropy of solution is expectted to be: a.negative b.zero c.positive d.negative at low T and positive at high T
21. ### Math

Solve by the elimination method. 4x +5y=1 8x +10y=2 What is the solution of the system? N Type an ordered pair. Type an integer or a fraction. Type N if there is no solution. Type I if there are infinitely many solutions.
22. ### math(am i right)

determine whether (-5,1) is a solution of 9x-9y= -3 I said no am i correct? solve by elimination mehtod. 2x+3y=4, 4x+6y=8 type as ordered pair, type N for no solution, I for many. I chose I am I correct?
23. ### chemistry

The mole fraction of CO2 in a certain solution with H2O as the solvent is 3.6 × 10−4. The molality of CO2 in this solution is about: A. 0.00036 m B. 0.0065 m C. 0.020 m D. 2.0 × 10−5 m E. 6.5 m

How many grams of water must be added to 2 grams of a 65% iodine solution in order to produce a 42% iodine solution? Round your answer to the nearest tenth
25. ### Chemistry

A solution made from .650g of an unknown compound in 27.8 g of diphenyl gave a freezing-point depression of 1.56 degrees C. Calculate the molality of the solution. (Kf for diphenyl is 8 degrees C/m)
26. ### chemistry

When 2.53 g of NaOH(s)(40.0g/mol) dissolves in 100.0 g of water, the temperature of the solution changes from 20 degrees C to 26.3 degrees C. Calculate qrx in KJ/mol specific heat of the solution is 4.18 J/(g*K)
27. ### chemistry

What volume of 9.54M sodium chloride solution must be added to the correct amount of water to produce 750. mL of a .327 M sodium chloride solution?
28. ### chemistry

A pH glass/calomel electrode was found to develop a potential of -0.0390 V when used with buffer of pH 5.52. With an unknown solution, the potential was -0.360 V. Calculate the pH of the unknown solution
29. ### chemistry

You have 100.7 g of saccharin, a sugar substitute, and you want to prepare a pH = 5.80 solution. What volume of solution can be prepared? For saccharin (HC7H4NSO3), pKa = 11.70 (pKa = −log Ka).
30. ### chemistry

SALT HYDROLYSIS 1.) Calculate the pH of a 0.24M sodium formate (HCOONa) solution. Kb=5.9x10^-11. 2.) Calculate the pH of 0.25M pyridium chloride (C5H5NHCl)solution. Ka=5.9x10^6.
31. ### AP Bio (but its a question about chemistry)

no idea how to do this... describe how you would prepare from the specified stock solution: 400 mL of 0.45 M urea starting with a 6 M urea stock solution
32. ### Chemistry

a saturated solution of barium chloride at 30c contains 150g water. how much aditional barium chloride can be dissloved by heating this solution to 50c?
33. ### Chemistry

a saturated solution of barium chloride at 30c contains 150g water. how much aditional barium chloride can be dissloved by heating this solution to 50c?
34. ### Math

A chemist needs to mix an 18% acid solution with a 45% acid solution to obtain a 12 liter mixture consisting of 36% acid. How many liters of each acid solutions must be used?
35. ### Chemistry

a saturated solution of barium chloride at 30C contains 150g water. How much additional barium chloride can be dissolved by heating this solution to 60C?
36. ### 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
37. ### chemistry

What is the molarity of each kind of ion in a solution of magnesium chloride that contains 29.0 g of magnesium chloride dissolved in enough water to make 1.73 L of solution? MgCl2 Mg2+ + 2 Cl-
38. ### Chemistry

A solution of .12 mol/L of phosphoric acid completely neutralizes .20L of a solution of sodium hydroxide with.a concentration of .15mol/L What is the neutralizing volume of the phosphoric acid?
39. ### Gen chem 1

According to the following reaction, what volume of 0.25 M CaCl2 solution is required to react exactly with 50.0 mL of 0.20 M Pb(NO3)2 solution? CaCl2(aq) + Pb(NO3) (aq)- PbCl2(s) + 2 KNO3(aq).
40. ### Chemistry

You dissolve 1.05 grams of an unknown diprotic acid in 200.0 mL of H2O. This solution is just neutralized by 5.00 mL of a 1.00 M NaOH solution. What is the molar mass of the unknown acid?
41. ### CHEMISTRY

A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound?
42. ### chemistry

a saturated solution of barium chloride at 30c contains 150g water. how much additional barium chloride can be dissolved by heating this solution to 60c
43. ### chemistry

A certain acetic acid solution has pH = 2.14. Calculate the volume of 0.0900 M KOH required to reach the equivalence point in the titration of 35.0 mL of the acetic acid solution.
44. ### Linear algebra

Consider for every real number a the linear system of equations: { x +( a + 1 )y + a^2 z = a^3 { ( 1 - a )x +( 1 - 2a )y = a^3 { x +( a + 1 )y + az = a^2 b)Find the values of a for which the system has no solution, infinitely many solutions, and a unique solution
45. ### AP Chemistry

A buffered solution was created by mixing solutions of NH4Cl and NH3 at 25 C. Which species, NH4+ or NH3, has the highest concentration in this buffered solution?. Justify your answer.
46. ### CNSC

A radiator contains 25 quarts of a water and anti-freeze, of which 60% is antifreeze. How much if this solution should be drained and replaced with water for the new solution to be 40% antifreeze?
47. ### chemistry

A 43.20 mL sample of 0.3260 M sodium hydroxide (NaOH) is required to react completely with 36.70 mL of a phosphoric acid (H3PO4) solution. What is the molarity of the phosphoric acid solution?
48. ### Chemistry

a 30 mL sample of vinegar is titrated with .1098 M NaOH. it takes 43.28 mL naOH solution to reach the endpoint. Determine the acetic acid concentration in the vinegar solution?
49. ### Chemistry

A 21.7 mL sample of 0.18 M KOH solution required 26.3 mL of aqueous acetic acid solu- tion in a titration experiment. Calculate the molarity of the acetic acid solution.
50. ### science

50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
51. ### science

50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
52. ### Chemistry

Solid NaI is slowly added to a solution that is .010M in Cu+ and .010M in Ag+... a.) which compound will precipitate first b.) calculate [Ag+] when CuI just begins to precipitate c.)what % of Ag+ remains in solution.

if i had a beaker with .0001M of Cu solution and copper solid (anode) and another beaker with 1M Cu solution and Cu solid (cathode), how would i calculate the half reactions of these two?

Q. a 50g sample of Al(NO3)3 is dissolved in water to prepare 1500ml of solution. What is the concentration, in mol/L, of NO3 ions in the solution? -The answer is 0.47 mol/L but I don't know how to solve it.
55. ### chemistry

Calculate the boiling point elevation of a solution containing 22.8 g of glucose (C6H12O6) dissolved in 672.0 g of water. Calculate the freezing point depression for the same solution.
56. ### chemistry

Calculate the boiling point elevation of a solution containing 22.8 g of glucose (C6H12O6) dissolved in 672.0 g of water. Calculate the freezing point depression for the same solution.
57. ### Chemistry

What volume (mL) of a concentrated solution of sodium hydroxide (2.00 M) must be diluted to 600.0 mL to make a 0.860 M solution of sodium hydroxide? Express your answer to the nearest tenth mL.
58. ### chemistry

how do you find the mass solute(g), GFM(g/mole), moles of solute, volume of solution, and molarity of solution (M), of CaSO(4)? *how would i solve this set by set? * what are the formulas?
59. ### Chemistry

Ammonia, NH3 is freely soluble in water, and has the value Kb=1.8x10^-5. If the pH of an ammonia solution is 11.4272, then what original concentration of NH3 (molarity) was used to make up the solution?
60. ### biology

A solution of the enzyme amylase was added to a solution of starch and kept at 25C. The starch was broken down by hydrolysis. Explain how you would determine the rate of hydrolysis.
61. ### Chemistry

which property of a distilled water solution will not be affected by adding 50 mL of CH3OH to 100.mL of the water solution at 25? conductivity mass freezing point boiling point please help
62. ### calculas

caluclas (intersection of three planes) HELP!!!? in the equations k is a real number 1.x-2y+z=4 2.x-y-z=3 3.x+y+kz=1 for what values of k does the system 1.have exactly one solution? 2.have an in finite number of solution?
63. ### Chemistry

A 5.55g sample of a weak acid with Ka=1.3 x10^-4 was combined with 5.00 mL of 6.00 M NaOH and the resulting solution was diluted to 750 mL. The measured pH of the solution was 4.25. What is the molar mass of the weak acid?
64. ### chemistry

a lab experiment calls for 10% acetic acid solution. The lab has only 5% and 15% acetic solutions available. How much of each should be mixed to obtain 10 liters of a 10% solution?
65. ### Chemistry

An aqueous sugar solution is formed by adding 50.1 g sucrose (C12H22O11) to 200.0 g water. What is the boiling point (in Celsius) of this sugar solution (this is NOT the ΔTb). Kb H2O = 0.51 Celsius/m
66. ### Chemistry

Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced.
67. ### Chemistry

Calculate the mass of ammonia salt that would remain if the solution were evaporated to dryness. When sulfuric acid reacts with ammonia solution an ammonium salt is produced.
68. ### 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?
69. ### Chemistry

In the following acid—base neutralization reaction HNO3(aq)+ KOH(aq) ----KNO3(aq) + H2O (I) What is the molarity (M) of an HNO3 solution if 50.0 ml is needed to react with 25.0 ml of 0.150M KOH solution?
70. ### Chemistry

What is the concentration in mol/L of a CuSO4 solution containg 1.0 mole of CuSO4 in 250 mL of Solution? I would like to know how to calculate the answer and be giving the correct answer please.
71. ### chem

1.Can a solution ever have a pH=0? 2.What does pH = 0 suggest about the concentration of the acid? 3.Can the pH ever be negative? 4.What is the significance of a negative pH in a solution? pls need help we didn't cover this in lecture yet.
72. ### Chemistry

If the molality of a CaCl2 solution is .100 mol/kg, and was made from 500.0 mL of water, how many grams of CaCl2 were needed to make the solution? Step by step would be appreciated!
73. ### chem

How many grams of NH4Cl must be added to 0.560 L of 1.90 M NH3 solution to yield a buffer solution with a pH of 8.50? Assume no volume change. Kb for NH3 = 1.8 10-5. i am confused as how to find the grams?
74. ### Math

Find the exact solution, using common logarithms, and a two-decimal-place approximation of each solution. log(7x + 4) = 2 + log(2x − 3) Solve the equation. log(x^3) = (log x)^2
75. ### Chemistry

A solution is made by dissolving 0.624 mol of nonelectrolyte solute in 795 g of benzene. Calculate the freezing point and boiling point of the solution. Tf=_ˆC Tb=_ˆC
76. ### chemistry

Why were we instructed to add distilled water to a metal nitrate solution? What purpose does the water serve in the experiment? Just to add volume so the probe can reach the solution?
77. ### Chemistry

A 23.16 ml volume of an H2A acid solution of unknown concentration with 2 drops of phenolphthalein required 14.24 ml of 0.135 M NaOH to reach the endpoint. What is the molar concentration of the acid solution?
78. ### Chemistry

Determine the sulfate ion concentration in a solution prepared by diluting 15.00mL of a 0.200M aluminum sulfate solution with 35.00mL of water. Assume the volumes are additive.
79. ### Chemistry

How much potassium chloride in grams is needed to prepare 1500ml solution of 3% kcl solution? This is my answer: 3x1500=4500 4500÷100=45 Answer is 45gm
80. ### Chemistry

Write an equation to represent the oxidation of I- to I2 in acidic solution, with ozone as the oxidizing agent. I know ozone will be reduced to H2O, but I am not sure how to figure out the acidic solution. Thank you!
81. ### Chemistry

A jar contains 75mL of a .45M silver nitrate solution. Will 200g of solid copper be enough to bring all the silver out of solution as a solid?
82. ### chemistry

an old tablet of vitamin c weighed 1.022 g. It was dissolved in 500 mL water, and a 25.0 mL aliquot of this solution required 22.6 mL of .005 M I2 solution to oxidize it. Calculate the mg vitamin C in the tablet.
83. ### Food Chemistry

A new food colorant has a molar absorptivity of 3.8x 10^3 cm^-1M^-1 at 510 nm: (1) what will be the absorbance of a 2X10^-4 M solution in a 1 cm cuvette determined at 510 nm; (2) what will be the percent transmittance (T%) of the solution in (1) in this case
84. ### biochemistry

You have 325 mL of an 0.11 M acetic acid solution. What volume (V) of 2.00 M NaOH solution must you add in order to prepare an acetate buffer of pH = 5.07? (The pKa of acetic acid is 4.76.)
85. ### CHEMISTRY !!! HELP !

You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.94? (The pKa of acetic acid is 4.76.)
86. ### CHEMISTRY

You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.94? (The pKa of acetic acid is 4.76.)
87. ### Analytical Chemistry

I have a 0.00156 M solution of CuSO4*5H2O in water (from 0.0398 g of CuSO4*5H20 in 100 mL of water). How would I calculate the ppm of Cu of that solution from that information?
88. ### Chemisty

You have 775 mL of an 0.11 M acetic acid solution. What volume (V) of 1.10 M NaOH solution must you add in order to prepare an acetate buffer of pH = 5.05? (The pKa of acetic acid is 4.76.) I don't know what to do!!! HELP!!!!
89. ### Chemistry

You prepare a buffer solution by dissolving 2.00 g each of benzoic acid, C6H5COOH and sodium benzoate, NaC6H5COO in 750.0 mL of water. What is the pH of this buffer? Assume that the solution's volume is 750.0 mL.
90. ### chemistry

75.0 mL of a 1.50 M solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 139 mL of water. What is the final concentration? Assume the volumes are additive.
91. ### Algebra

A chemical manufacturer wishes to fill an order for 700 gallons of a 24% acid solution. Solutions of 20% and 30% are in stock. How many gallons of 20% acid solution will be used in the desired mixture?
92. ### Algebra 1

Which cannot describe a system of linear equations? a) no solution b) exactly two solutions c) infinite solutions**** d) exactly one solution To be honest I think the answer is C. Please Help!
93. ### 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?
94. ### Chemistry

You wish to prepare 0.18 M HNO3 from a stock solution of nitric acid that is 18.9 M. How many milliliters of the stock solution do you require to make up 1.00 L of 0.18 M HNO3? Answer and..... HOW DO I DO IT?
95. ### Algebra 2

How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution? Please Show All Work!
96. ### chemistry, organic chemistry

How do we calculate the temperature of a mixture of hexane and heptane at which the mixture solution equals 1atm?This will be the boiling point of the solution
97. ### MATH

Pewee adds two liters of pure alcohol to a 30% solution of alcohol in water. If the new concentration is 40%, how many liters of the original solution were there?
98. ### Chemistry

Calculate ΔG at 298 K for the electrochemical cell consisting of Au metal in a 0.00500 M Au(NO3)3 solution and Cu metal in a 0.950 M Cu(NO3)2 solution.
99. ### algebra

If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. m - 2n = 16, 4m + 4 = 1
100. ### chemistry

you must prepare 300 mL of .750M NaBr solution using 2M NaBr stock solustion. how many mL of stock solution should you use?