Question: A buffer is prepared by mixing 0.056 L of 0.032 M sodium bicarbonate and 0.0200 L of 0.010 M NaOH. What is the pH?
List the following in order of increasing pH of their 0.1 M aqueous solutions (lowest to highest pH) NaBr NH4Br NaClO2 NaBrO2
Question: What is the pH of 0.097 M of triethylammonium chloride (CH3CH2)3 NHCL? I know that in order to solve this i need to find the Kb, which is equal to Kw/Ka, I know that Kw = 1E-14, but I do not know which Ka to use? Once i know the Kb, i will be able to solve this problem and find the pH, i just need help finding the a
Following netralization reaction H2SO4 + KOH ->
Compare the vapor pressures of methanol,ethanol,acetic acid, water, and benzene. Which compund appears to have the strongest intermolecular forces at 100C If one compound has a higher equilibrium vapr pressure than another at a particular temperature, will it necessarily have a higher equilibrium vapor pressure at all tempe
127. Calculate the temperature (K) of the earth if there were no greenhouse effect. Assume the solar irradiance is 1500 W/m2 and the total planetary albedo is 25 percent. (The Stefan Boltzmann constant is 0.567e-07 W/m2/K4). ****I've tried to answer this twice, but both times I was incorrect and the program gave the following h
1. 0.54 g of ammononium chlordie is dissolc=ved in 250 mL of solution. Calculate the molarity. 2. What volumne of solution would be required to deliver 6.84 g og 0.200 M aluminum sulfate solution? 3. Calculate the molarity of a solution if 126 mL of 6.25 M NaOH was diluted to a total volume of 250mL. 4. Calculate the pH
I need to see how the following is done. Calculate the pH of CO2-saturated water at 25 degrees C, given that the CO2 concentration in air is 320 and that, for carbon dioxide, the Henry's Law constant KH=3.4E-2 mol L-1 atm-1is at 25 degrees Celsius. Furthermore, the ionization constant, Ka, for H2CO3 has a value of 4.5E-7 mol
a. There are only four lines in the aromatic region of the fully 1H decoupled 13C NMR spectrum of propyl p-tolyl ether (110-160 ppm), yet there six aromatic carbon atoms. Explain. b. Which is a stronger base, aniline or cyclohexylamine? Explain. c. Write an equation for the reaction of pthalimide with potassium amide (a str
103897 okay if expalin math Only for above listed OTA-ONLY. All others called in. Please EXPLAIN the math. 100 mL of a 0.1 M NaOH solution is being titrated with 0.2 M HCl solution. a) What is the pH of the solution after 25 mL of the HCl solution has been added? b) What is the solution after an additional 20 mL of HCl solut
Please show all work and remember this is a first year course. Chem is my weakest subject. Please send responsse in Word. Also, if you are not willing to show me the proper way to do these by showing the calculations and will only supply me with some notes tht I could read out of any textbook myself, please do not take th
Everything is already answered I just need to know if I am on the right track, please help I am really struggling with chemistry and I absolutely need to know how to do these problems correctly, so if I am wrong can you please tell me were my error is. ----------- Which of the following salts would give you the lowest co
1. Conjugate Acid-Base Pairs. Identify the conjugate acid-base pairs in each of the following reactions. Label each species as an acid or a base. a. NH4+(aq) + CN-(aq) --> NH3(aq) + HCN(aq) b. CH3COOH(aq) + F-(aq) --> CH3COO-(aq) + HF(aq) c. HPO42-(aq) + H2O(l) --> H2PO4-(aq) + OH-(aq) d. NH3(aq) + SO4 2-(aq) --> N
I) At 25ºC, 0.212g of barium hydroxide is dissolved completely in sufficient water to make 0.25 liter of final solution. What is the hydroxide ion concentration in mol litre-1? Given answer in scientific notation to an appropriate number of significant figures. ii) What assumption must you make in order to carry out the cal
A solution is prepared by mixing 46.8 mL of 0.16 M Pb(NO3)2 with 75.3 mL of 1.4 M KCl. Calculate the concentrations of Pb2+ and Cl- at equilibrium. Ksp for PbCl2(s) is 1.6 10-5.
At 25 degrees C, 0.212 g of barium hydroxide is dissolved completely in sufficient water to make 0.25 liter of final solution. What is the hydrogen ion concentration (in mol/liter) in this solution? What is the pH of this solution (to the nearest integer)
Arrange the following five reduction half-cell reactions in order listing the largest positive reduction potential first and give the best oxidizing and reducing agents. Observations: i) A reacts spontaneously with 1 mol/L BNO3, 1 mol/L D(NO3) and dilute sulfuric acid. A does not react 1 mol/L C (NO3) ii) B does not re
When microorganisms reproduce they release waste products that may change the pH and prevent further reproduction. Therefore culture mediums for growing microorganisms are usually buffered. The median for the culture of lactobacilli includes a buffer prepared by dissolving 25 grams K2HPO4 and 25 grams KH2PO4 in water and dilut
See attached Hydrogen selenide can be prepared by the reaction of aluminium selenide with water, the other product being solid aluminium hydroxide, Al(OH)3. At STP hydrogen selenide gas has a density of 3.61g litre -1. Draw a diagram of how to prepare a jar of dry hydrogen selenide, from the reaction between aluminium sel
a) Write a balanced equation for the reaction of aluminium selenide with water to Hydrogen selenide and solid aluminium hydroxide (including physical states) showing the sequence of partially balanced equations needed, including a brief description of the strategy used. b) The density of hydrogen selenide at STP is 3.61 g lit
How do you calculate the percent disagreement using a calculator for 1.01x10^19 (Avogrado's number of oleic acid molecules /mol (theoretical result being Avogrado's number)? Please be specific because I am not quite sure how to do this on the calculator.
A 0.10 M Mn 2+ solution is saturated with H2S. At what pH will MnS begin to precipitate? [H2S] sat'd=0.10M
A phosphate buffer consisting of H2PO4(-1) and HPO4(-2) helps control the PH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the PH of a soft drink in which the major buffer is 0.153 M NaH2PO4 and .158 M Na2HPO4?
Methylamine, CH3NH2, is a weak base that reacts according to the equation CH2NH2 + H2O <--> CH3NH3^1+ + OH^1-. The value of the ionization constant, Kb, is 5,25 x 10^-4. Methylamine forms salts such as methylammonium nitrate, (CH3NH3^1+)(NO3^1-). (b) Calculate the pH of a solution maded by adding 0.0100 mole of a solid methylamm
Methylamine, CH3NH2, is a weak base that reacts according to the equation CH2NH2 + H2O <--> CH3NH3^1+ + OH^1-. The value of the ionization constant, Kb, is 5,25 x 10^-4. Methylamine forms salts such as methylammonium nitrate, (CH3NH3^1+)(NO3^1-). (b) Calculate the pH of a solution maded by adding 0.0100 mole of a solid methyl
1. 10.00 mL of 0.1000 M NH3 was diluted with distilled water to 40.00 mL. Calculate the pH of the dilute solution. (Kb NH3 = 1.8*10^-5) 2. The dilute solution was titrated with 0.0500 M HCl. Write the equation for the reaction between ammonia and hydrochloric acid. Calculate the pH of the solution after adding 4.00 mL
I have .20M of a solution NaCN. Ka for HCN = 4.0 x10 10. How do I solve for pH?
Benzoic acid is an organic acid with a Ka of 6.5x10^-5. It can also be used as a primary standard like KHP. If benzoic acid were used to standardize NaOH, determine if if the equivalence point is acid, basic, or neutral based on the following criteria?: pKa < 0 is strong acid 1<pKa< 10 weak acid pKa > 10 very weak I
37) Which the following aqueous solutions has the highest boiling point? a) 0.10 M potassium sulfate b) 0.10 M HCl acid c) 0.10 M ammonium nitrate d) 0.10 M magnesium sulfate e) 0.20 M sucrose 38) When 70 ml of 3.0 M Nasub2COsub3 is added to 30 ml of 0.1 M NaHCOsub3, the resulting concentration of Na+ is? 39) Which of
Question: A 0.600m aqueous solution of a weak acid HX has a freezing point of -1.28 degrees C. Calculate the % ionization of HX. - Kf H2O= 1.86 - m = molality