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Acids and Bases

Acids/bases 2

1. Equal molar amounts of hydrochloric acid and potassium hydroxide are mixed together in water. Is the resulting solution acidic, basic, or neutral? 2. Equal molar amounts of hypochlorous acid and sodium cyanide are mixed together in water. Is the resulting solution acidic, basic, or neutral? Ka hypochlorous acid = 3.5

Nernst Equation Reference Electrodes

Here is the question: Q: Show with the aid of a form of the Nernst equation that when using a pH sensitive glass electrode and reference electrode that the measured potential is proportional to pH. This is the answer I have: Nernst equation: E = E ° - 0.059/n * log Q Q is the reaction quotient, active mass of pro

PH of weak acid and weak base

Please help with the given problems: 1. Which one is a weak monoprotic acid: benzoic acid, perchloric acid, oxalic acid , sulfurous acid? 2. What is the pOH of a 0.0130 M aqueous pyridine solution? 3. What is the pH of a 0.150 M aqueous solution of ammonia? 4. What is the hydronium ion concentration in a 0.100 M h

Calculating the pH in a flask at points in the titration.

100.0 ml of 0.100 M acetic acid is placed in a flask and is titrated with 0.100 M sodium hydroxide . An appropriate indicator is used. Ka for acetic acid is 1.7 x 10 -5 a. when no NaOH has been added. b. after 25.0 ml of NaOH is added c. after 50.0 ml of NaOH is added d. after 75.0 ml of NaOH is added e. after 100

Chemistry: Ammonium Meta Tungstate

AMT (ammonium meta tungstate) has a MW of 2956.2 g/mol. Calculate the amount of AMT (in grams) needed to be dissolved in water that would give a 0.2 M AMT aqueous solution. Also on an unrelated problem, how would you dilute (with water) 12.1 Normality HCl and 14.8 Normality NH4H2O to give 1M HCL and 1M NH4H20 respectively?

Chemical Reactions: Oxidation and Reduction

Hello, I need help figuring these problems out! Thanks :-) 1. Balance the following equations: a. P4(s) + 02(g) --> P4O10(s) b. Fe2O3(s) + C(s) ----> Fe(s) + CO(g) c. C4H10(l) + 02(g) --> CO2(g) + H2O(g) + energy 2. Aluminum metal reacts with bromine gas to produce aluminum bromide. a. Write a balanced equation, incl

Preparation of an IV Solution

I need help preparing an IV solution. I have all the ingredients below in solid form, and plenty of sterile distilled water. I need to prepare a solution so that each liter contains the following ingredients at the following concentrations. 0.03 M Galactose 40 millimoles Fructose 50 milliev. lactose 0.008 M Magnesium Phosp


Lab: Standardization of NaOH Solution Procedure !: 1. Prepare the NaOH solution by dissolving approximately 4g of solid NaOH in 200mL of water in a 250mL beaker. Calculate the approximate NaOH concentration: a. Convert grams of NaOH to moles of NaOH (MW = 40.00, moles = g/MW) b


Chemistry Lab Procedure: 1. Take a burette from the glassware shelf and place it on the workbench. 2. Fill the burette with 50mL of 0.2M potassium permanganate solution. Record concentration. 3. Take flask and add 10mL of New hydrogen peroxide (New H2O2). 4

Constant-Pressure Conditions of Hydrogen Gas

I'm reviewing for my Chem final and need stuff explained. Please give very in-depth explanations and answers so I can understand how to do it. At 46 degrees C a sample of ammonia gas exerts a pressure of 5.3 atm. What is the pressure when the volume of the gas is reduced to on tenth (0.10) of the original value at the same

Questions I am iffy on

I am completing this class now, reviewing the entire scope of classwork leading to the finals, and there are some review questions I am just real shaky on-and some I simply cannot find an applicable formula for. Thank you! 1. The measured voltage of a cell in which the following reaction occurs is 0.96 V: H2(g, 1.0 atm

Solution Properties Examined

Chapter 13 Practice 7. By referring to the figure , determine the mass of each of the following salts required to form a saturated solution in 350 of water at 30 : , , 10. Calculate the mass percentage of in a solution containing 10.8 in 481 water. 13. An ore contains 2.88 of silver pe

Convert the following numbers to standard exponential form

I attached a copy of this file if it is better, some of the symbols didnt come through the cut and paste. Thanks. 1. Convert the following numbers to standard exponential form: a) 0.003621 ________________ b) 0.0847 __________________ c) 15 4 ____________________ d) 536.2 x 103 _______________

Types of reactions

I have a paper to write on types of reactions. Precipitation, acid-base, and oxidation-reduction reactions. We have to find and discuss and example of each reaction type that has industrial significance. Could you give me some direction?

Acid-Base Equilibria Calculated

1. Calculate [OH-] for 2.170 g of LiOH in 300.0 mL of solution. [OH-] = ? M 2. How many moles of HF (Ka = 6.8 x 10-4) must be present in 0.160 L to form a solution with a pH of 3.30? 3. Calculate the molar concentration of [OH-]ions in a 7.0×10−2 M solution of ethylamine (C2H5NH2) (Kb= 6.4 x 10-4). 4. Calculate

Natural Chemistry and Cramps

1. Compare the natural chemistry that takes place in the environment with the chemistry that takes place due to man made factors like pollution. Discuss the effect of pollution at the local, regional, national, and global level. 2. A freshman studying medicine at an Ivy League College is a part of his class crew team and exe

Balancing chemical equations and calculating yield.

When baking soda (sodium bicarbonate or sodium hydrogen carbonate, NaHCO3) is heated, it releases carbon dioxide gas, which is responsible for the rising of cookies, donuts, and bread. The balanced equation for this process is: 2NaHCO3 ® Na2CO3 + H2O + CO2. Calculate the mass of NaHCO3 required to produce 20.5 g of CO2. Plea

Vitamin C Content of Orange Juice Lab

I have attached the sheet I need help with...Here is the info from the lab and my results are in the sheet so far. The prepared iodine solution on the chemicals shelf with a stated concentration of 0.0015M is standardized (confirming the concentration) by performing the following titration: 1. Take a clean volumetric fla

Acids, Bases and Salts

1. State three examples each of acids, bases, and salts commonly used in therapeutic processes. From the examples you state, select one acid, one base, and one salt and describe how and where they are used in therapeutic processes. Please note that the examples should not duplicate those already shared in your readings 2. A 5

Concentrations and Solutions

1) The Equilibrium constant Kp for the reaction 2SO2(g) + O2(g) --- 2SO3(g) Is 5.60 x 10^4 at 350 degrees C. The initial pressures of SO2 is 0.350 atm and the initial pressure of O2 is 0.762 atm at 350 degrees C. When a mixture equillibtrates, is the total pressure less than or greater than the sum of the in

Characteristics of Acids and Indicators

1.) Methyl red is a common acid-base indicator. It has a Ka equal to 6.3 x10-6. Its un-ionized form is red and its anionic form is yellow. What color would a methyl red solution have at pH = 7.8? green red blue yellow violet 2.)The Ksp value for lead(II) chloride is 2.4 x 10-4. What is the mol

Five pH and pOH problems are presented, solved, and fully explained.

1. If the pH of an aqueous solution is 8.23, what are the hydrogen- and hydroxide-ion concentrations of this solution? 2. If 7.40 grams of Ca(OH)2 is dissolved in sufficient water to make 100mL of solution, what is the hydroxide-ion concentration of this solution? 3. What is the hydroxide-ion concentration, the pH, and the hyd

Reactions and Properties of Oxygen Compounds

1. balance equations:----> (equals heat ) NaNO3 ----> NaNO2 + O2 SiO2 -----> no reaction PbO2 -----> PbO + O2 MgO -------> no reaction KClO3 -----> KCl + O2 2 .Rocks and soil on the Moon, as on the Earth, consist mainly of silicon-oxygen compounds, called silicates. What is the chance that astronauts could easil

Gravimetric Analysis

Describe the basic steps involved in gravimetric analysis. How does this procedure help us determine the identity of a compound or the purity of a compound if its formula is known? Explain. Answer needs to be in a 200-300 word response in essay form.

Chemical Reactions : Types and Equations

Procedure 1 Synthesis: 1. Take a crucible from the Glassware shelf and place it on the workbench. 2. Take a balance from the Tools shelf and drop it on the empty crucible. Record its mass. 3. Add 2g of Mg to the crucible and record its mass. 4. Remove the crucible from the balance. 5. Take a Bunsen burner from t

Electrochemistry and the Nernst Equation

1.Consider the following cell at equilibrium: Mg(s) / Mg+2 (0.01 M) // OH- (?) / Mg(OH)2 (s) / Mg (s) Given: Mg+2 + 2e- ---> Mg(s) Eo = -2.360 V Mg(OH)2 (s) + 2e- ---> Mg(s) + 2 OH- Eo = -2.690 V a) Write each half-reaction and the net cell reaction. Find the standard net cell potential. b) Find the pH of the right cel

Bromothymol Blue : Ka and Ionic Strength

QUESTIONS 1. Explain why it is not necessary to know the exact concentration of bromothymol blue in the solution. 2. The pKa value can also be determined from Figure 4 - explain. 3. The acid dissociation constant for bromothymol blue is dependent on ionic strength of solution. Determine the ionic strength of bromothy

Lewis Acids and Bases, pH, and Weak Acids

Question 1: Using the Lewis concept of acids and bases, identify the Lewis acid and base in each of the following reactions: 1. Al(NO3)3 a) Lewis Acid b) Lewis Base c) Neither 2. H2O a) Lewis Acid b) Lewis Base c) Neither 3. CH3NH2 a) Lewis Acid b) Lewis Base c) Neither 4. HBr a) Lewis Acid b) Lew

PH and Indicator Lab Report

PH Indicator Procedure #1 pH Indicators for Acids: 1. Take seven clean test tubes from the Glassware shelf and place them on the workbench. 2. Add 5 mL of 0.1M HCl and 5 mL of water from the Chemicals shelf to the first test tube. 3. Add 9 mL of water to the 6 remaining test tubes. 4. Pour 1 mL of the solution fr