a density of 1.0 M solution of NaCL

29,400 results, page 82

Chemistry

The ΔH per mole of CaCl2 is -81.0 kJ. Calculate the final temperature of an aqueous solution if 30 g of CaCl2 are added to 100 g of water at 23oC. Assume that the specific heat of the solution is the same as that of water

college chemistry

A solution of C6H5CO2Na hydrolyzes according to the equation. If the [C6H5CO2H] in the solution after hydrolysis is 0.00000294 M, calculate the equilibrium concentration of C6H5CO2Na. C6H5CO2-(aq) + H2O(l) = OH-(aq) + C6H5CO2H(aq) Kh=1.59×10-10 What does Kh stand for? Is it ...

Speech

After analyzing a problem, what is the next step in the problem-solving process? a. Develop creative solutions. b. Identify possible solutions. c. Select a solution. d. Implement a solution. I think it might be B

chemistry

g)How many grams of agarose are needed to make 100 ml of 2.5% agarose solution?. h) Calculate the volume of buffer to which 500mL of 40 mM potassium chloride solution must be diluted to make a new concentration of 0.001M.

Chemistry

Suppose you are going to add 450 mL of a 0.10 mol/L hydrochloric acid solution to 250 mL of a 0.2 mol/L sodium hydroxide solution. a)Which one is the limiting reactant? b)What is the theoretical yield of sodium chloride?

chemistry(PLease Help)

An aqueous solution contains 0.223 M carbonic acid and 0.112 M hydrobromic acid. Calculate the carbonate ion concentration in this solution. [CO32-] = mol/L. Can you please help me how to solve this problem?

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. 2.5M * 0.025L/2=x/132 =4.125g

chemistry

Titration of 50.00 mL of 0.0521 M sodium oxalate, Na2C2O4, required 38.71 mL of a potassium permanganate solution: 5 C2O42- + 2MnO4- + 16H+ = 2Mn2+ + 10 CO2 + 8H2O Calculate the molarity of the potassium permanganate solution.

Chemistry

A watch is to be electroplated with gold. - provide a solution that would make a suitable electrolyte for this cell. I'm not quite sure how to figure out what the electrolyte solution is made of. Any help you can give me would be wonderful!

Chemistry

A buret is partially filled with NaOH solution, to a volume of 1.14 mL. A 20-mL sample of 0.1011 M HCl is titrated to a faint pink phenolphthalein endpoint. The final buret reading is 22.37 mL. What is the molartiy of the NaOH solution?

Chemistry

Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?

Chemistry

Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?

Math

1.) Can a system of linear equations have exactly two solutions? A. True B. False 2.) The solution of a system of equations with no solution describes what kind of lines? a.) parallel b.) perpendicular c.) skew d.) coincidental

chemistry

what is the hydronium ion concentration of a 0.35M oxalic acid, H2C2O4. solution? for oxalic acid, ka1= 5.6x10^-2 and ka2=5.1x10^-5. Identify and calculate the concentrations for the representative species in solution.

chem

sample of 1.00g of BaSO4 and a similar sample of 1.00g of CaSO4 were added to water at 25 Celsius to give 1L of solution. Calc. the concentration of Ba2+, Ca2+, and SO4^2- ions present in the solution?

CHEMISTRY

If a solution is made by dissolving 15g of each solid in the same 100g of water at 70 degrees and the solution is cooled to 20 degrees, crystals are observed.. Which solid crystallises and explain in reference to both solids

Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

chemistry

An 11.1-g sample of CaCl2 is dissolved in 123 g water, with both substances at 24.0°C. Calculate the final temperature of the solution assuming no heat loss to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C·g.

Chem

An antifreeze solution is prepared containing 40.0 g of ethylene glycol (molar mass = 62.0 g/mol) in 60.0 g of water. Calculate the freezing point of this solution. Which calculation is it? A. 120.1⁰C B. -20.1⁰C C. 0.518 ⁰C D. 20.1⁰C

CHEMISTRY

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.

Solar

Greeting All, please assist with the below. Thanks. The spectral power density of a solar simulator is given by: P(λ)=7.5∗1015λ−2.25∗109 [Wm^-2m^-1] for 300nm<λ<500nm P(λ)=2.25∗109−1.5∗1015λ [Wm^-2m^-1] for ...

Chemistry

1.If the atmosphere can support a column of mercury 762 mm high at sea level, what height of water could be supported? The density of water is approximately 114 that of mercury.Answer in units of mm 2.If the atmosphere can support a column of mercury 762 mm high at sea level, ...

Chemistry

A student placed 17.0 g of glucose (C_6H_{12}O_6) 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 the solution was ...

science

identify the solute and solvent for this solution: copper II Sulphate solution The solvent is water. See if you can guess what the solute is.

chemistry

if you are given a acid solution, how do you find the concentration of hydroxide .. solution is made of hydrochloric acid and sodium hydroxide

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

CHEMMMM

a solution is 0.10M in free NH3, 0.10M in NH4Cl, and 0.015M in [cu(NH3)4]. Will Cu(OH)2 (s) precipitate from this solution? Ksp of Cu(OH)2 is 2.2810^-20

Chemistry

You have a stock solution of 13.4 M NH3. How many milliliters of this solution should you dilute to make 100.0 mL of 0.100 M NH3

Chemistry

a solution is made by combining 5 mL of .2M HC2H3O2, 5 mL of .2M NaC2H3O2, and 10 ml of water. calculate the molarity of HC2H3O2 and of NaC2H3O2 in this new solution

chemistry

At 25 degrees Celsius the Ka for a 0.120 mol/L solution of acetic acid (HC2H3O2 ) is 1.8 X 10-5. determine the pH of the acetic acid solution

chemistry

26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.

chemistry

26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.

Grade 12 Chemistry

Determine the concentration of a calcium chloride solution if 1.75 L of the solution contains 0.125 mol of calcium chloride.

Chem

Can you show me step by step how to do the following problems? How many grams of KI are in 25.0 mL of a 3.0 % (m/v) KI solution? How many milliliters of a 2.5 M MgCl2 solution contain 17.5 g MgCl2?

Chemistry

If 15.omL of 0.0250 M aqueous H2SO4 is required to neutralize 10.0 mL of aqueous solution of KOH, what is the molarity of the KOH solution?

chemistry

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

chemistry

If an aqueous solution is 1.54 % by weight in sodium chloride and contains 6.96 g of sodium chloride, what mass of water is present in the solution?

10th chem

Describe, in detail, how to make 3.0 liters of a 3.5 molar HCl solution from an 18.5 molar HCl stock solution.

chemistry

If 33.0 mL of 0.002 M aqueous H3PO4 is required to neutralize 28.0 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution.

pharmacy math

RX Potassium Chloride 3:5 solution 30ml. how many millimeters of a potassium chloride 2:5 solution do you need to prepare the order?

Algebra

how much pure acid must be added to 15 ounces of an acid solution which is 40% acid in order to produce a solution which is 50% acid?

pharmacy math

Rx Potassium 2:5 Chloride solution 30ml. How many milliliters of a potassium chloride 3:5 solution do you need to prepare the order?

chemistry

An aqueous solution of cobalt(II) nitrate has a concentration of 0.471 molal. The percent by mass of cobalt(II) nitrate in the solution is %.

Clinical chemistry

Prepare a 10 percent solution of sulphuric acid from a 98 percent stock solution of the acid in a 500mls beaker

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?

Chemistry

If an aqueous solution is 5.08 % by weight in sodium chloride and contains 1.79 g of sodium chloride, what mass of water is present in the solution?

Chemistry

A few questions I don't really get and need to see the work for A 50.0 mL sample of 0.55 M benzoic acid, C6H5COOH, a weak monoprotic acid, is titrated with 0.51 M NaOH. Calculate the pH at the equivalence point. Ka of C6H5COOH = 6.5 multiplied by 10-5. What is the pH of a ...

Chemistry

H20SO4(aq)-> 2H+(aq) + SO4 2- (a) Calculate the hydrogen ion concentration (in mol 1-1) in this solution. Show steps and explain your reasoning Also what is the pH of the sulfuric acid solution nearet whole number You don't have any numbers. Sulfuric Acid (H2SO4) is a ...

chemistry

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium sulfate is added, a ...

Analytic Chemistry

At 25 °C, you conduct a titration of 15.00 mL of a 0.0260 M AgNO3 solution with a 0.0130 M NaI solution within the following cell: Saturated Calomel Electrode || Titration Solution | Ag (s) For the cell as written, what is the voltage after the addition of the following ...

Chemistry - check answers

1) Which of the following sets is arranged according to increasing base strength? A) F-, OH-, Cl- B) F-, Cl-, OH- C) OH-, F-, Cl- D) OH-, Cl-, F- E) Cl-, F-, OH- (my answer) 2) What is the pH of a solution formed by adding 4.3 x 10^-5 moles of KOH in 1 L of water? A) 4.3 x 10...

Chemistry

A solution is prepared that contains 0.0200 M AgNO# and 0.150 M KSCN. What is the equilibrium concentration of Ag+ ion in this solution? The Kf for Ag(SCN)4^3+ is 1.21x10^10 I'm not even sure how to set up this problem? Would I need to do an ice box? Ag(SCN) --> Ag+ + SCN

chemistry

The polarogram for 20ml solution that was 3.65 x 10^-3 M in cadmium (Cd2+) gave a wave for that ion with a diffusion current of 31.3microampere. Calculate the percentage change in concentration of the solution is the current in the limiting current region were allowed to ...

Organic Chemistry - Extraction

You have 100 mL of a solution of benzoic acid in water; the amount of benzoic acid in the solution is estimated to be about 0.30 g. The distribution coefficient of benzoic acid in diethyl ether and water is approximately 10. Calculate the amount of acid that would be left in ...

algebra

Q: when graphing the equation y = 4/3x + 2, the y intercept is? A: (0,2) Q: Determine whether - 3.5 is a solution of the inequality. x greater than or equal to 6 A: No Q:identify the y intercept of y = x + 8 A: (0,8) Q:solve using multiplication principle then graph - 15x >...

Chemistry

only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction that occurs. NaCl (aq) + BaCl2 (aq) --> Na2SO4 (aq) + BaCl2 (aq) --> NO3^- (aq) + OH^- (aq)+ Al (s) --> CO3^2- (aq) + OH^- (aq) +Al (s) -->...

CHEM HELP ASAP

I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was then dissolved in 50....

CHEM HELP ASAP

I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was then dissolved in 50....

Chemistry

Question: a 25.00 mL. aliquot of a solution containing TI(aq) was treated with K2CrO4. the TI2CrO4 was filtered, washed free of excess precipitation reagent, and dissolved in dilute sulfuric acid. the dichromate ion produced was titrated with 40.60 mL. of .1004 m Fe solution. ...

physics

Four tubes are set up in the lab at sea level as shown by the figure. The letter under each tube corresponds the question with the same letter. 1 atm = 101300 Pa = 101300 N/m2 ρwater = 1000 kg/m3 (a) What is the pressure pushing down on the surface of the water in tube (a...

chem 211

When 20.0 mL of 0.535 M H2SO4 is added to 20.0 mL of 1.07 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and KOH reacted. (Assume that the total volume is the sum of the individual volumes and ...

Chemistry

Using calculations, determine how you would make a 525 ml pg a 0.50 M solution of Cl- ions using CaCl2. I am unsure how to do this question, I was going to use C1V1=C2V2 but with this I would be missing the first part of the equation. If that is the case, would I assume the ...

Chemistry 152

How many of the following processes would you expect to be spontaneous at 298K and 1atm? dissolving sugar in water decomposing NaCl to the elements climbing a mountain H2O (l)------H2(g)+O2(g) Choose one answer. a. 0 b. 1 c. 2 d. 3 e. 4 I thought that it might be 3 of the ...

chemistry

Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) -> FeCO3(s) b) 1/2 N2(g) + 2 O(g) -> NO2(g) c) 2 Na(s) + Cl2(g) -> 2 NaCl(s) d) Ba(s) + N2(g) + 3 O2(g) -> Ba(...

chemistry

it has been a while since ive done these so i just need a refresher. im looking for the heat of hydration of lithium chloride and sodium chloride. compound Lattice Energy deltaH soln LiCl -834 kj/mol -37.0 kj/mol NaCl -769 kj/mol +3.88 kj/mol what is delta H hydration?

chem

it has been a while since ive done these so i just need a refresher. im looking for the heat of hydration of lithium chloride and sodium chloride. compound Lattice Energy deltaH soln LiCl -834 kj/mol -37.0 kj/mol NaCl -769 kj/mol +3.88 kj/mol what is delta H hydration?

Math, statistics

Problem 1: The PDF of exp(X) (6/6 points) Let X be a random variable with PDF fX. Find the PDF of the random variable Y=eX for each of the following cases: For general fX, when y>0, fY(y)= Solution: f_x(ln(y))/y When fX(x) = {1/3,0,if −2<x≤1,otherwise, we ...

MATH

I have about 30 questions of this, so I need to understand the process. Please make it as detailed as possible! Thank you! Q: To reduce 32 grams of a 25% solution of antiseptic to a 10% solution, how much distilled water should a pharmacist add? A: Equation: _____ Answer is: ...

Chemistry: Freezing point

An aqueous solution is prepared by dissolving 1.08 g of human serum albumin, a protein obtained from blood plasma, in 50.0 mL of water. The solution has an osmotic pressure of 0.00770 atm at 298 K. What is the molar mass of the albumin? Answer: 6.86 x 10^4 g/mol

chemistry

Arginine vasopressin is a pituitary hormone. It helps regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressinin 100.0 mL of solution has an osmotic pressure at 25 ¢ªC of 3.70 mmHg. What ...

ecc

Arginine vasopressin is a pituitary hormone. It helps regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressinin 100.0 mL of solution has an osmotic pressure at 25 ¢ªC of 3.70 mmHg. What ...

CHEMISTRY!

A 20.00 mL of 0.200mol/L magnesium chloride solution is added to a 95.00 mL of 0.800 silver (I) nitrate solution, and a precipitate is formed. a.Determine the concetration of the nitrate ions at the end of the reaction I was able to calculate the things and make an IRF table ...

Science, chem

Develop a method to prepare 100 ml of 0.500mol/l aqueous CuSO4x5H2O solution. Include the water molecules that are hydrated to the crystals as given in the molecular formula, in your calculation of the molar mass. show all your calculations. Prepare the solution.

Chem

Depending upon the tip of a dropper pipet, there are approximately 20 drops per milliliter of water. The experimental procedure indicates the addition of 5-10 drops of each solution to the test tubes. Calculate the volume range in milliliters for the solution. Can you please ...

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. Using the formula C(Concentration)=n(moles)/v(Volume measured in litres.) How am I supposed to solve this question given two volumes?

Engeneering mathematics

how many litres of a solution containing 18 percent sulfuric asid and how many litres of another solution containing 25 percent sulfuric asid must mixed together to make 550 litres solution containing 23 percent of sulfuric acid

chemistry

An aqueous solution with a pH of 3.00 is diluted from 2.0 L to 4.0 L. Wht is the pH of the diluted solution?

chemistry

A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution?

Chemistry

If 3.0 L of a 5.0 M SrCl_2 solution is diluted to 40 L, what is the molarity of the diluted solution?

Chemistry

If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

Chemistry

If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

chemistry

If 4.0 L of a 4.9 M SrCl2 solution is diluted to 40 L, what is the molarity of the diluted solution?

math

Do 3x^2-7x+2=0 verify that the sum of the solution is -b/a and verify that the product of the solution is c/a

Chemistry

What is the pH of a 0.0353M solution of NH4F and a 0.0000666M solution of NH4F?

inequality

find the solution to the following inequality 2(2x-6)>x+3, then graph the solution.

CHEMISTRY

How to prepare a 500ml 0.2M NaOH solution from 2.0M NaOH solution

algebra

What is the solution to the linear system of equations? x + 4y = 8 x y = 7 (4, 3) (4, 3) (7, 0) The system has no solution.

CHEM 136

A sample of 25.00 mL of 0.100 M HNO2(in a flask) is titrated with 0.150 M of NaOH solution at 25 degrees. 1) calculate the volume(Ve) of the NaOH solution needed to completely neutralize the acid in the flask. 2)calculate the pH for (a)the initial acid solution in the flask (b...

Ciollege algebra

Suppose that X liters of 38% acid solution are mixed with y liters of a 42% solution to obtain 100L of a 39% solution. One equation in a system for solving this problem is x+y=100. Which one of the following is the other equation? A. 42x+38y=0.39*100 B 0.38x+0.42y=0.39*100 C. ...

Chem

A compound that dissolves in water to form an aqueous solution that is an excellent conductor of electricity is always present in the solution as -covalent molecules -acid molecule -base molecule -salt molecules -ions

chemistry

A 4.14 m solution of the solute methylene chloride dissolved in the solvent ethanol is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 1487 g of methylene chloride. CH2Cl2-1327 (kg/m^3) C2H5OH-789.3 (kg/m^3)

chemistry

the concentration of aluminium sulfate in an aqueous solution at certain temperature is 2.7x10^-8 mol/l a) calculate Ksp for this salt at this temperature should i assume it is in a saturated solution and just use the given concentration?

Chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 750 mL of a solution that has a concentration of Na^+ ions of 1.3 M? Express your answer numerically in grams.

Chemistry

When ammonium chloride is dissolved in water, the solution becomes colder. What can you say about the relative magnitudes of the lattice energy of ammonium chloride and its heat of hydration? Why does the solution form? What drives the process?

ap chemistry

A solution is prepared in which a trace or small amount of Fe+2 is added to a much larger amount of solution in which the [OH]- is 1.0M*10^-2. some Fe(OH)2 precipitates. the value of Ksp for the salt is 8.0*10^-10. assuming that the hydroxide ion concentration is 1.0M*10^-2 ...

Chemistry

The boiling point elevationof an aqueous sucrose solution is found to be 0.39 degrees Celsius. What mass of sucrose (molar mass=342.30g/mol) is contained in 500g of the solution? Kb (water)=0.512degrees C/m

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