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Acids and Bases

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

Only for 103139, 103897

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

Chemistry Practice Problem Set

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 absolutly 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 lowe

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

Ion Concentration

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

pH of a Buffer Solution and After Dilation

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

Dry Hydrogen Selenide

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

Percent disagreement and avogrado's number

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.

Word problem using equations

When hydrochloric acid (hydrogen chloride) is released in the air, the oxygen reacts with it to produce chlorine gas and water. if you use 20.0L oxygen, how much hydrogen chloride(in g)could you react with to use the oxygen? a. 32.6g b. 8.15g c. 4088g d. 130g

PH and precipitation

A 0.10 M Mn 2+ solution is saturated with H2S. At what pH will MnS begin to precipitate? [H2S] sat'd=0.10M