a density of 1.0 M solution of NaCL
29,680 results, page 72

chemistry
I'd like to do a titration test, I've got a sulphuric acid solution @ 1M (2N) but I need one @ 0.12N. How many ml of the 1M (2N) solution do I need to add to distilled water to make up 100ml please? 
Chemistry dilution
51.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124mL portion of that solution is diluted by adding 125 mL of water. What is the final concentration? Assume the volumes are additive. 
Algebra 2
Graph the linear system and estimate the solution. Then check the solution algebraically. 7x+y=17 3x10y=24 I have to have 4 labeled points and I'm not getting the fraction thing. Any help would be great! 
chemistry
50.0ml of an aqueous solution of 2.50M H3PO4 are mixed with 75.0 ml of an aqueous solution of 4.00 M Ca(OH)2. The resulting precipitate is washed and isolated using filtration. What mass of Ca3(PO4)2 is obtained? 
algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x4)(x+2)/(x3)(x+5) ¡Ü0 
algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x4)(x+2)/(x3)(x+5) ¡Ü 0 
chemistry
A 1.0 L solution has 10.00 grams of CaCl2 dissolved in it. What is the Molar solubility of AgCl in this same solution? The Ksp for AgCl is 1.6 x 1010 at this temperature. Hint: watch out for the common ion again. 
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. 
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 400mL of a solution that has a concentration of Na+ ions of 1.10M ? 
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 
chemistry
A 300 mL solution of 0.0500 M HCl is titrated with 1.00 M KOH. How many mL of the KOH solution will be needed to reach the equivalence point of this titration? A.5 mL B.10 mL C.50 mL D20 mL E15 mL The answer i got was E. 15ml 
pre  CALCULUS
Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets. x + y = 8 x  y = 14 A. {( 3, 11)} B. {( 3, 11)} C. {(x, y)  x + y = 8} D. ∅ B? 
Chemistry (Acids and Bases)
What is the pH of a 0.400 molar HCl solution? I did log(.4)=.398. That seems too low. I think I need to find the molarity (M) of the solution, but I can't find it with the given information. 
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 550 mL of a solution that has a concentration of Na+ ions of 0.600 M ? 
Chemistry
How to find the mass of a solid formed when: 45.00ml solution of 0.003 800 mol/L lead (II) nitrate is mine dish a 30.00 mL solution of 0.08800 mol/L strontium iodide 
chemistry
what is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions solution"? 
Science
What is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions in solution?" 
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 calculations. I don't understand what to plug into the hh equation. 
chemistry
Moles chemistry? Calculate the mass of solute required to prepare ib the solution 200cm^3 of solution containig 0.50 mol dm ^3 cliond prepared by dissolving cacl2.6h2o in water. 
Science, Chemistry
A 1050.0 mL solution of NaOH is neutralized by 0.25 L of 2.00M Nitric Acid using Bromothymol Blue as an indicator. The concentration of the NaOH solution is 0.48M. True or False 
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? 
chem(REALLY NEED HELP )
calculate the total mass of carbon dioxide gas produced when you burn 1000ml of gasoline Density of heptane = 0.684g/ml density of octane =0.703g/ml a) Calculate the mass of carbon dioxide produced from combustion of heptane C7H16 + O2  CO2 + H2O b)CALCULATE THE MASS OF... 
chemistry
If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are titrated with 0.10M NaOH... 
Chemistry
You have 100 mL of a 0.450 M sulfuric acid solution, but you now need to add NaOH to make the solution basic. How much NaOH ( in grams) will you need to add to make the solution have a pH of 13.0? The units are grams of NaOH. 
Chemistry AP
Each response gives a pair of solutions. Which pair of solutions should conduct electrical current equally well? 1. 0.10 M NH3 and 0.10 M NH4Cl 2. 0.10 M NaNO3 and 0.10 M HNO2 3. 0.10 M HBr and 0.10 M HF 4. 0.10 M NaCl and 0.10 M NaClO4 Please help... I would also would like ... 
Chemistry
Which of the following pairs would make a good buffer? A. H2C2O4 and HC2O4 B. HNO3 and NO3 C. NaOH and NaCl D. HCl and NaOH Would it be C? I think I remember learning about these in a lesson about buffers, hence why my instinct is to go with C... 
chem help w/ Lab
Weight of the mustard package Sample: 3.02 (g) Weight of the mustard package Solution: 33.3 (g) Trial #1 Trial #2 Trial #3 Weight of Mustard Package Solution Delivered (g) : 1.09 .948 .909 Weight of NaOH Solution Delivered (g) : .354 .304 .269 Concentration of NaOH : 7.48e3 (... 
Math 
A)For a certain commodity the demand equation is given by D=3p+20. At the price of $1, four units of the commodity are supplied.If the supply equation is linear and the market price is $4, find the supply equation. B) how many litres of a 70% alcohol solution must be added to... 
VERY URGENT MATH~!!!!!!!!
1. 2(x – 3) = 2x (1 point) one solution no solutions infinitely many solutions 2. 3(y – 3) = 2y – 9 + y (1 point) one solution no solutions infinitely many solutions 3. 10x – 2 – 6x = 3x – 2 + x (1 point) one solution no solutions infinitely many solutions 4. 4(x... 
Chemistry
A 35 mL solution of HCl, reacts completely with 20 mL of 0.25 M KBr. What is the molarity of the HCl solution? 
algebra
How do you know if a value is a solution for an inequality and how is this different from determining if a value is a solution to an equation? 
Calculas HS
show that the solution has exactly one solution in the interval x+ln(x+1)=0, 0<and equal to x <and equal to 3 
MATH
Which of the following equations has the given solution set? Solution set: Ø A)2m + 5 = 2m + 5 B)2m + 5 = 2m + 5 C)2m + 5 = 2m  5 D)none 
Chemistry
Determine the pH of each of the following solution. a solution that is 5.8×10^−2 M in HClO4 and 2.6×10^−2 M in HCl 
algebra
How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? 
Chemistry
If 15.0ml of a 6.0M HCl solution is diluted to 75.00ml, what is the molarity of the diluted solution? 
chemistry
if 200.0 ml of 0.800 m is prepared from a 70.0 ml stock solution, what is the molarity of stock solution 
chemistry
The solubility of Mg(OH)2 in a particular buffer solution is 0.66g/L . What must be the pH of the buffer solution? 
chemistry
Starting with a 2.0 M NaOH solution, determine how you would prepare 1 L of a 0.1 M NaOH solution. 
chemistry
What is the molarity of a salt water solution containing 8moles of salt in 2 L of solution? 
science
a solution is 40% in NAOH. calculate the mole fraction of NAOH if it is an aqoues solution 
Chemistry
Why can a waterethanol solution be used for recrystallization but not a waterhexane solution? 
chemistry
4) An aqueous solution is 1.65 m glucose. What are the boiling point and freezing point of this solution? 
chemistry
How many liters of 2.09 HCl solution would be needed to prepare 1.14 L of 0.69 M HCl solution? 
science
how much sugar is dissolved in 50grams of a solution if the solution is 20% sugar by mass 
Chemistry
Calculate the pH of a solution that is 0.124 M C2H5NH2 and 0.124 M C2H5NH3Cl. (Assume that the solution is at 25°C.) 
Chemestry
IF 121ml of a 1.0 M glucose solution is diluted to 500.0 mL, what is the molarity of the diluted solution? 
ALG
Solve. (If there is no solution, enter NO SOLUTION.) y=x^2x3 y=2x+3 (x,y) smaller value larger value 
chemistry
A solution contains 3.10 g of solute in 10.4 g of solvent. What is the mass percent of the solute in the solution? 
Chemistry
Weight of solution is 1026gm in aqueous solution.what will be the weight of per kg H2O? 
chemistry
Current can pass through salt solution but not through sugar solution ,why? 
Chemistry
Describe how you would prepare 500 mL of a 0.10 M solution of HCl from a 12.0 M solution of HCl. 
Science
Why is it easier to recover silver from a solution than to recover lithium from the same solution 
Chemistry
What is the pH of a solution made by mixing 1.40 mL of 0.0043 molar Sr(OH)2 with 8.90 mL of 0.0029 molar Sr(OH)2 solution? 
Science
6.02 molecules of urea are present in100 ml of its solution . The concentration of urea solution is 
Science
What volume of a 2.00 M HCL solution can be prepared by diluting 0.350L of 14.0 M HCl solution? 
Chemistry: Raoult's Law
If 0.380 mol of a nonvolatile nonelectrolyte are dissolved in 3.00 mol of water, what is the vapor pressure P(H2O) of the resulting solution? The vapor pressure of pure water is 23.8 torr at 25 C. I got this answer correct: 21.1 torr A solution is composed of 1.50mol ... 
math
A tank contains 50 gallons of a solution composed of 90% water and 10% alcohol. A second solution containing 50% water and 50% alcohol is added to the tank at rate of 4 gallons per minute. As the second solution is being added, the tank is being drained at the rate of 5 ... 
Chemistry
Question: of the salts, NaC2H302, NaCN, NaCl, and NH4NO3, how many form neutral aqueous solutions? How do you determine which are neutral and which do not form neutral solutions? 
Physics help
In Millikan's experiment, an oil drop of radius 1.516 µm and density 0.860 g/cm3 is suspended in chamber C (Figure 2214) when a downwardpointing electric field of 1.92 105 N/C is applied. Find the charge on the drop, in terms of e. (Include the sign.) Calulate the mass of ... 
chem
The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 106 (one million) parts of solution. Mathematically by mass: ppm = µg solute / g solution = mg solute / kg solution... 
ap
For an electrochemical reduction process, electrons are 1. taken from solution species at the surface of the cathode. 2. added to solution species at the surface of the anode. 3. added to solution species at the surface of the cathode. 
chemistry
A 1M solution (200ml) of NH3 (Kb of ammonia=1.8*105) is added to 200ml of 0.5M HCl. Calculate: a) the resulting pH? b) The delta ph due to addition of 15ml of 1M HNO3 to solution obtained in part a c) I am stuck on this: The delta ph due to addition of 15ml of 1M NaOH to the ... 
CHEMISTRY
A STUDENT STUDYING THE FE+3 HSCN equilibrium put into a test tube 10.00ml of 2.00 x 103 M Fe(NO3)3 with 10.0 mL of 2.00 x 103 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the equilibrium ... 
AP Chem
1. Van't Hoff factors depend on the concentrations of the dissolved solute species. Why would a dilute solution have a Van't Hoff factor closer to the ideal value? a. because in dilute solutions solute species are less likely to bump into each other and pair up. b. because in ... 
Chemisty
Based on equation: 2MnO4¬¬() + 6H(+) +5H2O2 → 2Mn(2+) +8H2O + 5O2 A 50.0 mL solution of hydrogen peroxide of unknown concentration was diluted with 1.00L of water. 25mL of this diluted solution was then titrated with acidified potassium permanganate; 20.25mL 0f 0.02 ... 
Equation Help
In our text book the following equation is given: P=(pm  p)g * R where P is the pressure drop R is the manometer reading pm is the density of the manometer fluid p is the density of the process fluid in the pipe g is the acceleration do due to gravity Then our professor told ... 
Chemistry
(Paper Chromatography) 1. What carrier solution might work well to separate newspaper inks? Why? 2. What carrier solution might work to separate different salts? Why? 3. What carrier solution might work to separate different fatty acids? Why? I really have no idea what the ... 
chem
a mixture of NaBr & NaCl has a mass of 2g & found to contain 0.75g of Na. What is the mass of NaBr in the mixture? 
Science
How would you prepare 10 mL of 0.08 M NaCl in sodium acetate buffer? (Stock Sodium acetate buffer: 0.1 M) 
Chemistry
During the preparation of K3[Al(C2O4)3].3H2O, NaOH was added slowly and with stirring over an approximately 10minute period to a solution of Al2(SO4)3 solution. The combined solution was heated to almost boiling and left to stand for a few minutes. 1. Why does NaOH added ... 
chemistry
An aspirin tablet weighing 0.548 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ... 
College Chemistry/Lab Math
I think I have this problem figured out correctly, but is there anyone who can tell me if I'm doing something wrong. The question is... "One troy ounce of gold is worth $380. There are 33.8 grams per troy ounce. You have a stock colloidal solution of a very fine gold dust. It'... 
Physics, Calculus(alot of stuff together)= HELP!!!
~it was bumped over to the next page so I recopied it and added my answer for the question and was wondering if my integration was correct since you said DrWls:I forgot t use the expression B + Cx for p, and used A + Bx instead. The method of solution is the same. In your case... 
Chemistry
This is a back titration question and I'm struggling with it :/ So if you can help me, that would be very appreciated :) Q. A sample of steel wool was dissolved in excess sulfuric acid. The resulting solution (FeSO4 aq) was then titrated with potassium permanganate. 26.5mL of ... 
chemistry
need help with a question calculate the concentration of grams of sodium stearate per milliliter of diluted solution. To do this, multiply the concentration of sodium stearate in the dishwashing liquid by the dilution of the solution(1.50 ml dishwashing liquid per 100ml ... 
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) 
chemistry
The boiling point of water at 735 mmHg is 99.07C. What percent by mass of NaCl should be present in a water soln to raise the boiling point to 100.0C? [Kb for water is 0.512 C kg solvent (mol solute )1] 
Chemistry
I did a lab, an kinetics lab (iodide clock) and in my lab report I have to calculate the initial rate in mol L1 s1 and I'm not sure how to do that. I have the [I] and [S2O82] in mol L1 already. The reagents are [KI] [NaCl] [Na2S2O3] [Na2SO4] [K2S2O8]. 
College Chemistry 100
The topic is about acids, bases, and salts. The two equations are given: H20 + HCL > H30 + CL; H20 + HC2H3O2 <> H30 + C2H3O2 The question is: A solution with a volume of one liter contains 0.45 mole HC2H3O2 and 0.48 mole C2H3O2 ion. (Ka for HC2H302 is 1.82 x 105) ... 
earth//space science
what is an inverse relationship? explain the relationship between the density of a planet and the distance the planet is from the sun "what is an inverse relationship? explain the relationship between the density of a planet and the distance the planet is from the sun." the ... 
Chemistry
a precipitate is expected when an aqueous solution of potassium iodide is added to an aqueous solution of: sodium sulfate iron(II) chloride calcium perchlorate barium hydroxide lead nitrate 
chemistry
You transfer a 2M stock solution of Y into a container using a slightly wet pipet containing water drops. The concentration of the transferred solution Y has a ? (lower, higher, or same) concentration than(as) 2M. 
chemacid base titrations
If 20.0mL of .2019M HCI requires 39.63mL of a NaOH solution for complete neutralization, what is the concentration of the NaOH solution? how many significant figures are justified in the answer? 
chemistry
The pH of 100 mL of a 0.10 M aqueous solution of Compound Z is 11.30. (a) Is Z an acid, a base, neither, or cannot be determined? Justify your choice. (b) Write the relevant BronstedLowry equation showing how Z behaves in aqueous solution 
CHM 152
The freezing point of an aqueous solution of glucose was measured to be 1.52 oC. What is the osmotic pressure, in atm, of 100 mL of this solution at 25.0 oC? (Kf = 1.86 oC/m) When I calculated it out I got 16.79 atm but the answer was wrong don't know what I messed up on. 
Chemistry
A 4.50 g sample of LiCl at 250 C dissolves in 25.0 ml of water also at 25.0 C.? The final equilibrium temp of the resulting solution is 60.8 C. What is the enthalpy of solution, deltaHs, of LiCl expressed in kilojoules per mole. 
Systen of Equalities
Which term best describes the solution of the situation represented by the system of inequalities? (Assume that x >= 0 and y >= 0.) x + 2y <= 4 x – y <= 1 f(x, y) = 3x + 2y The terms are one optimal solution unbounded infeasible alternate optimal solutionss 
chemistry
You add thiocynanate ions to a solution The molarity of silver ion is 0.1M initially. Calculate the max concentration of SCN ion that exists in the solution before AgSCN beings to precipitate? ? 
Chm General 2
if a student doing an experiment failed to dry the KHP before using it to standarize the NaOH solution. A) Would her calculated molarity of the NaOH solution probably be too hight or too Low? 
Chemistry College Level
36.85 mL of a KMnO4 solution when acidified reacted with 1.076g of Mohr's salt, Fe(NH4)2(SO4)2 x 6H2O What is the normality of the KMnO4 solution? How do I set this up? I can't figure it out at all... 
chemistry
Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution. 
Chemistry
Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution. 
Chemistry
An aqueous salt solution is formed by adding 11.67 g sodium sulfate (solute) to water (solvent). What mass (in g) of water is used if the freezing point of the solution is 12.9 Farenheit. Kf H2O = 1.86 Celsius/m 
Science (Chemistry)
How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.99? Kb for ammonia is1.8*10^5. Can anyone help me with this question? I have no idea how to solve it. 
math help
A lab assistant wants to make FIVE LITERS of 31.2% acid solution. If solutions of 40% and 18% are in stock, how many liters of each must be mixed to prepare the solution. i don't even know what equation to use or anything, please help me, thank you. 
Chemistry 2
A saturated solution of a certain metal(II) chloride has a chloride ion concentration of 0.032M. The Ksp for this compound can be determined to be a) 2.6 X 107 b) 4.1 X 106 c) 1.6 X 105 d) 2.6 X 104 e) 1.6 X 102 I am unsure how to approach this problem or the steps to ... 
Chemistry
A solution in which no more solid can be dissoved is referred to as [saturated?] In such a solution, the concentration of solute is called the ____ when reported in g/L and the [molarity?] when reported in mol/L. Does anybody know what might go in that blank by any chance? 
Math
I need help atleast an equation to get started please A lab assisstant wants to make five liters of 27.8% acid solution. If solutions of 50% and 13% are in stock, how many liters of each must be mixed to prepare the solution. 
Chemistry
A volume of 60.0mL of aqueous potassium hydroxide (KOH ) was titrated against a standard solution of sulfuric acid (H 2 SO 4 ). What was the molarity of the KOH solution if 25.7mL of 1.50 M H 2 SO 4 was needed? The equation is 2KOH(aq)+H 2 SO 4 (aq)¨K 2 SO 4 (aq)+2H 2 O(l)