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Acids and Bases

Ph problem

A weak base with Kb=4.240*10^-7 is added to water to make a 2.00*10^-1 M solution. what is the pH? Since Kb is small, can assume that the dissociation is small relative to initial concentration of weak base.

2 titration

For which type of titration will the ph be basic at the equivalence point? Show work. Thanks

Reaction Types, Limiting Reagents and Yield Questions

Balanced Reaction: Ti(OH)4 + 2H2SO4 ---> Ti(SO4)2 + 4 H20 - Name each reactant,and product. What type of reaction is this? What is the limiting reagent? - How many grams of water can be produced from this reaction? Show the calcuation of the molar masses of the necessary substances before showing the calculation for theor

Calculating Concentration

What is the concentration of 25.0 mL of HCl if it is completely neutralized by 47.4 mL of 0.250 M NaOH?

Completing and Balancing a Reaction

In the lab you add excess hydrochloric acid (HCl) to 2.65 g of Na2CO3. Complete and balance the reaction, and identify the state of each substance.

Balanced Reaction

Show the complete, balanced reaction when 2.35 grams of Ti(OH)4 reacts with excess sulfuric acid.


Question: 5.0 mL of 12 mol NH3 / Litre solution is added to 500.0 mL of 0.050 mol AgNO3 / Litre solution. Assume the combining volumes are additive, What molar concentration of silver ion will exist in solution after equilibrium is established? Ag+ + 2 NH3 = Ag(NH3)2+ ( Kf for Ag(NH3)2+ is 1.5 x 107 ) P

Mass of potassium hypochlorite

What mass of potassium hypochlorite must be added to 450.0 mL of water to give a solution with pH = 10.20? Please see the attached file for full problem description.

Concentration diet cola

Please see the attached file for full problem description. show work and all steps for problem, thanks for your time

Buffer effective

Over what range of pH is a HOCl - NaOCl buffer most effective? pH 2.0 - pH 4.0 pH 7.5 - pH 9.5 pH 6.5 - pH 8.5 pH 6.5 - pH 9.5 pH 1.0 - pH 14.0

Solving for Molar Ratios

Question: You are asked to go into the lab and prepare an ethanoic acid - sodium ethanoate buffer solution with a pH of 4.00 ± 0.02. What molar ratio of [CH3COOH] / [ CH3COONa] should be used?

Buffer solution

Question: Which one of the following combinations cannot function as a buffer solution? HCN and KCN NH3 and (NH4)2SO4 HONO2 and NaNO3 HF and NaF HONO and NaNO2

Chemistry: Molarity, Molar Mass, Oxidizing Agents, Mole Fraction and more

7 general chemistry questions. Example: At 20 degrees Celcius, the vapor pressure of toluene is 22 mm Hg and that of benzene is 75 mm Hg. An ideal solution, equimolar in toluene and benzene, is prepared. At 20 degrees Celcius, what is the mole fraction of benzene in the vapour in equlibrium with this solution? (a) 0.23 (b)

pH of a Mixed Solution

1) Calculate the pH when equal volumes of 0.100 M of H2PO3- and 0.02 M HCl are mixed. 2) Calculate the percentage dissociation of acetic acid at pH = 3.69.

Lab Report: Reaction Order and Rate Laws

Objective: To study the effect of reactant concentration on the rate of the reaction between sodium thiosulfate and hydrochloric acid and to determine the order of each reactant and the rate law for the reaction. 2 HCI(aq) + NaS2O3 (aq) --> S(s) + SO2 (aq) + H2O(l) + 2NaCL(aq) Calculations: (a) Calculate the initial an

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 questi

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.

Chemical Reaction

Describe the chemical reaction that occurs when copper is reacted with nitric acid. Is the outcome temperature and or concentration dependent?

Solutions, Acids, Bases

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