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Physical Chemistry

AP Chemistry

Consider two solutions. One solution is 0.1115 M Ca(OH)(2). The other is 0.1050 M HClO(4). a) Write a balanced equation for the reaction between the two solutions. b) How many mL of Ca(OH)(2) will be required to neutralize 25.00 mL of the HClO(4)? c) If a student starts to titrate 31.39 mL of the Ca(OH)(2) solut

AP Chemistry

Question 3: The salt NaBrO(3) oxides Sn^2+ to SnCl(6)^2- in the presence of hydrochloric acid according to the equation 3 Sn^2+ (aq) + 18 Cl^- (aq)+ BrO(3)^- (aq) + 6 H^+ (aq) -> 3 SnCl(6)^2- (aq) + Br^- (aq) + 3 H(2)O A sample weighing 2.000g is

AP Chemistry Problem

1: Consider mixing solutions of silver nitrate and calcium chloride. a. write a net ionic equation for the formation of the precipitate. b. If 200.0 mL of .300 M silver nitrate are mixed with 350.0 ml of .500 M calcium chloride, how many grams of precipitate are formed? How many moles of each ions are present after orecip

Acidity of various substances

What color- red or blue- would you expect each of the following to produce when added to litmus: Milk of magnesia wine seawater coca-cola tomato juice

Entropy Change of Heating Argon

Calculate the entropy change when 100 g of argon is heated and compressed from 300 K, 1.0 atm, to 900 K, 17 atm, assuming ideal gas behavior. Cp=20.93 J/K mol

Explain solubility rules

Explain solubility rules used to predict precipitation reactions. Predict if precipitation occurs in the mixing reactions of the following aqueous solutions: a) ammonium sulfate + iron(II) nitrate b) potassium iodide + lead(II) nitrate c) sodium nitrate + copper(II) sulfate d) ammonium iodide + silver nitrate

Particle in a Box

Calculate the ground-state energy of a particle in a box of length a, that is subject to a perturbing potential of V(x) = Vx/a .

Understanding volume

If I have the mass total and I'm trying to find the volume of one of the items that makes up the total mass? D=M/V

Helium balloon

If a helium balloon breaks loose it rises into the atmosphere and at some point bursts. Explain why?

Vacuum Question

Materials vacuum chamber and pumper large marshmallow balloon Procedure Wear safety goggles. 1. Place one large marshmallow in the vacuum chamber. 2. Cover the chamber with the dome and insert the pumper into the rubber septum. 3. Raise and lower the pumper slowly and observe what happens to the marshmallow. 4. The

physical chemistry

One problem that we will continue to face as the population of the earth steadily increases is fresh water. Even though there is an abundance of water on this planet, less than 5% of it can be used to sustain life. Therefore, new ways of purifying water are being developed. One of the best recent developments is using reverse

Monoatomic Gas

I need some help deriving the ideal gas equation for a monatomic gas.

Calculating Atomic Fractions Of Fluorine

Calculate the fraction of Fluorine atoms at 1000 K in each of the first three electronic levels based upon the following data: Term symbol..................Wave number (cm^-1).....................Degeneracy P_3/2........................................0.0.................................................4 P_1/2.............

Working with ideal gas law

The pressure of a sample of gas at a constant temperature of 25 degrees C is increased from 1.0atm to 1.3atm. If the original volume was 3.8 liters, what will the new volume (in liters) be?

Various Basic Chemistry Problems - Mole, Mass and other Calculations

1) When a mole of C2H4 is combusted it reacts with 3 moles of O2 to produce CO2 and H2O. How many moles of CO2 and how many moles of H2O are produced? 2) What is the mass in grams of 4.25 moles of Mg (NO3)2? 3) The overall reaction producing iron from an ore in a blast furnace is: Fe2O3 + 3CO --> 2Fe + 3CO2 How many

Calculating molar concentrations of acetic acid

1) Calculate the hydrogen ion concentration and the pH of the solution formed when 0.020 gram-formula weight of nitric acid is added to one liter of aqueous 0.20 M ammonia solution. Assume no significant volume change upon addition of the acid. 2) Calculate the molar concentration of acetic acid at equilibrium in an acetic ac

Ferrous ion reaction

How do I calculate the moles of iron (ore sample) and how do I calculate the mass percent of iron in the ore from this problem; Ferrous ion reacts with permanganate ion Mno4 in acidic solution to produce the ferric ion Fe3. A 6.893 gram sample of ore was mechanically crushed and then treated with HCl which oxidized all the ir

Calculating vapor pressure using temperature

Hi, Please explain as ELEMENTARY as possible. Thank you (-: A liquid has a heat of vaporization of 35.5kJ/mol and a boiling point of 122 EC at 1 atm. What is its vapor pressure at 109EC?

Solvent: Finding the Kf Value

Question: A solution of 0.2113 g of water dissolves in 25.0 g of a solvent which freezes at 11.5 EC below the freezing point for the pure solvent. What is the Kf value for this solvent?

Calculate temperature using vapor pressure

Hi, Please explain the math as elementary as possible. Thanks. The vapor pressure of Ethanol is 115 torr at 34.9EC If H sub vap = 40.5 kJ/mol, calculate the temperature (in EC) at which the vapor pressure is 760 torr.

Understanding Vapour Pressure

Which would you expect to exhibit the highest vapor pressure at room temperature? - Helium(Delta H fusion 0.02, Delta H vaporization 0.10) - Benzene(Delta H fusion 9.95, Delta H vaporization 30.8) - Water(Delta H fusion 6.01, Delta H vaporization 40.67) - Mercury(Delta H fusion 2.33, Delta H vaporization 56.9)

Solution Concentrations

Find the concentration of 500mg of alltrans retinol 0.1% per 1 ounce of solution. Vitamin A C20H30O F.W. 286.46 CAS 68-26-8 Ratings Health: 1 Flammability: 1 Reactivity: 0 Chemical Specifications: Assay Min. 99% Storage Information: LIGHT SENSITIVE, REFRIGERATE: Keep tightly clos

Heating and Cooling Chemical Reactions

Why when heating and cooling three different separate substances in open containers does the mass change in two of them (one loss mass; the other gained mass) but stays the same in the third when it is known that mass is conserved in chemical reactions? Would it be because one gave off vapor, the second melted and the third was

Gibbs-Duhem Equation

In a certain binary solution, the activity of component 1 is given by R * ln(alpha_1) = R * ln(x_1) + A(x_2)^2 + B(x_2)^3 Where x_1 and x_2 are the respective mole fractions and A and B are constants. Derive an expression for alpha_2 (the activity of component 2) given that the equation above is valid over the entire conc

Semi-Empirical Expression for a Dilute Real Solution

Starting with the definition of osmotic pressure Pi = -RT/V_ml * ln * (p_so*ln)/(p_1)^0 Derive the semi-empirical expression for a dilute real solution Pi/C' = RT/M_2 + bC' Where C' is the concentration expressed in (g solute)/(dm3 solution) and b is known as the interaction constant. Then use the semiempirical formu

Fugacity from Bethelot equation

Carbon dioxide obeys the reduced Bethelot equation reasonably well (i have attached the equation) Given Tc = 304.3K and Pc = 73.0 atm, calculate the fugacity of carbon dioxide at 150 degrees C and 50 atm.

Ideal gas law? free energy of mixing ...

I think the ideal gas law does not apply in this following problem because this problem is addressing a liquid. then how do i think through and do this problem? Calculate the free energy of mixing when 1 mole of liquid A is mixed with 4 moles of liquid B at 25 degrees C to form an ideal solution. What is the change in chemic

Standard Temperature Pressure and Volume

1. The respiratory rate of a person is 20 breathes per minute. If every average breath is about 310cm^3 of air at 22C and 740mmHG, what volume of air in cubic meters and corrected to standard temperature and pressure conditions does a person breathe in one day?