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Acids and Bases

Back titration of ammonium chloride

In a labratory. A solution of Ammonium chloride was given, for us to find the concentration by techniques of back titration. NaOH was added to the diluted ammonium chloride and heated. Then Titrated with HCL adding few drops of bromocresol green indicator. Colour turned yellow. What does this mean? I have done the calculation.

Acid Base Equilibrium

Will an acid-base reaction with an equilibrium lying to the right place if Na(+) A(-)is added to HB? (HB has a pka = 10):if it's needed to answer the question.

Empirical Formula of the Compound

A compound of iron and oxygen is found to have a mass of 6.13 grams. If the mass of iron is determined to be 4.29 grams, what is the empirical formula of the compound? Please give step by step answer in simplest way to do not making it complicated. Show all steps and solution please.... (See attachment for rest of question

MOLARITY of Sodium hydroxide solution

Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. A sodium hydroxide solution was standardized by titrating 28.71 mL of 0.1822 M standard hydrochloric acid. The initial buret reading of the sodium hydroxide was 2.70 mL and the final reading was 30.33 mL. What was the molarity

Solving for the pH of a Compound

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

Equilibrium vapor pressures

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

Acid / Base Indicators

A. An acid/base indicator is red when the molarity of hydronim ion is less than 1.0x10^-8 and yellow when the molarity of hydronium ion is greater than 1.0x10^-6. What will the color of this indicator be in a solution of pH = 5.0? B. How many grams of NaOH are there in 3.00L of a 1.00M solution?

Balancing Chemical Equations Questions

Write balanced chemical equations for the following: -Ionization in water of the weak acid HF -Ionization in water of the strong acid HI -Reaction of the strong acid HI with the strong base NaOH in water -Interaction of the weak base C2H5NH2 with water. -Ionization of the strong base KOH in water.

PH solution in water

What is the pH of a solution in water with a H3O+ ion concentration of 3.5x10-8 M. Is this solution acidic or basic?

Balanced equations

Write balanced chemical equations for the following: A. Ionization in water of the weak acid HF B. Ionization in water of the strong acid HI C. Reaction of the strong acid HI with the strong base NaOH in water D. Interaction of the weak base C2H5NH2 with water. E. Ionization of the strong base KOH in water.

Solutions, Acids, Bases Molarity of a Solution

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

The pH level for saturated water

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

Strong Acid & Bases NMR

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

pH Calculations for Acids

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

Acid Base Equilibria

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

Lowest Concentration of Salt in Water

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

Acid-Base Equilibria

1. Determining Ka. What is the Ka value for a weak acid if a 0.0150-M solution has a pH of 2.67? 2. Calculations With Ka. What is the pH of a 0.250-M benzoic acid solution? 3. Polyprotic Weak Acid. What are pH, [H3O+], [HSO3-], and [SO32-] in a 1.50 M sulfurous acid solution? 4. Calculations With Kb. What

Conjugate Acid-Base Pairs

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

The dissolution of a solid in water

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

Hydrogen Ion Concentration

At 25C 0.212g of barium hydroxide is dissolved in water to make 0.25ltr final solution. molecular mass 154.33 contains 137g Ba 16g O 1g H - need the hydrogen ion concentration in mol litre-1 in scientific notation. and the PH of this solution to the nearet integer -does the answer agree with the sort of PH value expected for a b

Acid-Base Equilibrium

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.

Ion concentration and pH of solution

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)

Arranging half-cell reactions in order

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