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Acids and Bases

Complete and balance equation. Work must be shown.

1) Complete and balance the following reactions. a) Mg + P4 --==== b) CaO + SO2 --------- c) Li + H2CO3 ---------- d) H2MnO4 + Al(OH)3 ------- e) K2O + H2CO3 -------- f) HNO3 + H2O ---------- g) As4O6

Acid, Bases, Equilibria Questions

1) The solvent cation in liquid ethanol, CH3CH2OH, is a) CH3CH2O- b) H+ c) CH3CH2OH+ d) CH3CH2OH2+ e) CH3CH2OH- Answer _________ 2) Fill in the blanks. a) the normality of 0.20M solution of H2SO4 ________________________ b) The following reaction is best classified as an Arrhenius, Br

Mass - Aspirin Question

Please see the attached file for the full problem description. Aspirin (C9H8O4) is synthesized by reaction salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is: See attached a) What mass of acetic anhydride is needed to completely consume 1.00 x 10^2g salicylic acid? b) What is the maximum m

Chemistry applied practical situations - pH of soil

Assume that Isaac Asimov's figures are correct, and that 3.5 X 10 to the 14th power of the 3.0 X 10 to the 26th power carbon atoms in your body are radioactive. Calculate the fraction of carbon atoms that are radioactive carbon-14. Natural sources of radiation account for 82 % of all public exposure while human-made sources a

Acid/Base Chemistry Problems

1. Solve the following problem related to the solubility of equilibria of some metal hydroxides in aqueous solution. a) The solubility of Cu(OH)2 (solid)is 1.72x10^-6 gram per 100 ml of solution at 25 degrees C. i. Write the balanced chemical equation for the dissociation of Cu(OH)2 (solid) in aqueous solution. ii. Calcula

Ka for a monoprotic acid

In a 4.03 * 10-2 M solution of a monoprotic acid, the percent dissociation is 49.6. Calculate Ka for this acid.

Which one is acidic, basic or neutral?

Will 0.10 M aqueous solutions of the following salts be acidic ("A"), basic ("B") or neutral ("N") (Assume a solution is neutral if its pH is 7.00 plus or minus 0.05). a. disodium hydrogen citrate b. sodium dihydrogen citrate c. sodium sulfate d. ammonium dihydrogen phosphate e. ammonium cyanide f. ammonium hydrosu

Ionization and reactions of acids and bases

1. Write equations for the following: A. Ionization of the strong acid, HBr in water B. Ionization of the weak acid, HNO2 in water. C. Reaction of the weak base (CH3)2NH with water. D. Reaction of the acid, HNO3 with CaCO3 solid. E. Reaction of HCl(aq) with KOH(aq)

Calculate the pH

1) Calculate the pH of the following solutions: (a) 0.010 M acetic acid (Ka= 1.76E-5) CH3COOH + H2O --> H3O+ + CH3COO- initial 0.010 -- ? ? Equilibrium 0.010-x -- ? ? Show how did you solve this equation to get 1.76E-5: Ka = [H3O][CH3COO]/[CH3COOH] = 1.76E-5 (b)

Find pH

Could you show me how you solved to get pH of each solution: Solution A has [H3O+] = 7.2à?10-5 Solution B has [H3O+] = 7.2à?10-4 Solution C has [OH-] = 3.0à?10-11 Solution D has [OH-] = 6.5à?10-11 (i) Which solution has the highest pH? (ii) Which solution is the least acidic? (iii) Which solution is the most

Calculating Necessary Tonnes of Lime to Raise a Lake's pH

One of the impacts of fossil fuels is an increase in acid deposition (or acid rain as many people refer to it). The following exercise asks you to calculate how much lime (an alkaline rock, not the tasty green fruit) it would take to increase the pH of a small lake. Consider a small lake in the Adirondack region of New York

PH calculations

Calculate the pH with the correct significant figures of: a. A solution prepared by dissolving 2.55g (NH4)2SO4 (FW=132.141;Ka of NH4 = 5.7x10^-10)in 100.0 ml of water, adding 100 ml of 0.201 M NaOH, and diluting to 500.0 ml with water. b. H2C, is a weak diprotic acid with a Ka1=1.2X10^-3 and Ka2 = 8.9x10^-9. A 30.00 ml

Determine minimum pH for precipitate formation

What is the minimum pH at which aluminum hydroxide, Al(OH)3 will precipitate from a 0.020 M Al(NO3)3 solution. Consider activity effects. The Ksp for Al(OH)3 is 3x10^(-34). Assume the pH can be changed without increasing the solution volume.

Calculating Mass

Sodium chloride is obtained when sodium carbonates react with hydrochloric acid. The equation for the reaction is: Na2CO3 = 2HCl --> 2NaCl + CO2 + H20 Calculate the mass of sodium chloride that can be obtained when 5 g of sodium carbonate is completely decomposed. (RAM = C=12, 0 = 16, Na = 23)

Working with the decomposition of sucrose in acidic medium

Sucrose decomposes in acid solution, according to the first order rate law, to give Glucose and fructose. If the half life for the reaction is 3.33 hours at 25 degree celcius, what fraction of a sample of sucrose would remain after 9 hours ?

Solution Reactions of Strong Electrolytes

1. Identify each of the following substances as strong electrolyte, weak electrolyte, or nonelectrolyte: Ba(NO_3)_2 Ne NH_3 NaOH. 2. Predict and explain which of the following systems are electrically conducting: solid NaCl molten NaCl an aqueous solution of NaCl. 3. Characterize the following compounds as solu

A flow chart detailing some reactions of an Ester

Using the flow chart provided (see attachment Brainmass Problem 6). Please answer the following. 1) Give the structures and names of compounds 1-7. 2) Estimate the pH of compound 3? 3) Explain with an equation the reaction in which compound 4 is changed to 6 4) What are the key differences between the hydrolysis o

Multiple choice questions about buffering solutions.

Which of the following solutions is not a buffer? a. 125mL of 0.200M HCl added to 200mL of 0.400M CH3CO2- b. 200mL of 0.400M HCl added to 125mL of 0.200M CH3CO2- c. 200mL of 0.500M NaOH added to 200mL of 1.000M HF d. 100mL of 0.500M H2PO4- added to 100mL of 0.100M HPO42- e. 100mL of 0.200M HF added to 300mL o


For Ca(OH)2, what will occur if 1.0L of 0.100M Ca(NO3)2 is prepared at pH 12.00? a. A precipitate will form because Ksp>P b. A precipitate will form because P>Ksp c. No precipitate will form because Ksp>P d. No precipitate will form because P>Ksp e. No precipitate will form because P=Ksp

Ksp---2 Problems

1.) A saturated solution of calcium sulfate can be prepared by diluting 0.29g of CaSC4 to 250mL. what is the Ksp of calcium sulfate? 2.) At pH 10.0, only 0.019g of MgCl2 will dissolve per 1L of solution. What is the Ksp of magnesium hydroxide, Mg(OH)2?

The effects on pH when a buffer is diluted

What is the effect on pH when a buffer is diluted by a factor of 10? a. The buffer pH does not change appreciably b. The buffer pH increases by 1 c. The buffer pH decreases by 1 d. The buffer pH increases by 10 e. The change is dependent on Ka of the acid