Friday
November 28, 2014

Posts by chamy


Total # Posts: 17

Chemistry
Are the renew molecules or ions formed when SO2(g) mix with CaCl2, HCl?
May 28, 2012

Chemistry
Is there a net ionic equation for Ca(NO3)2 and K2CrO4?
May 24, 2012

Chemistry
In experiment of silver, lead and mercury(I) chlorides mix with NH3, how does the heating of the lead precipitate present after the addition of NH3help identify the formula ?of the precipitate
May 22, 2012

Chemistry
Why doesn't a reaction occur when thiosulfate ions are added to solid silver iodide, but does occur when added to silver bromide?What role does the equilibrium concentration of silver play in this phenomenon?
May 22, 2012

Chemistry
In the experiment of electroplating of copper, how could I remove the copper plate from my key a) Electrically? b) Chemically
May 11, 2012

Chemistry
Cadmium and a solution of cadmium(II) nitrate are used with tin and a solution of tin(II) nitrate to construct a galvanic cell. 1) The reaction run initially at standard state with 100-mL samples of each solution is allowed to proceed until 8.0 g of tin has been deposited on ...
April 29, 2012

chemistry
how to explain that HCL is a stronger acid than HOCL?
April 24, 2012

chemistry
N2(g) + 3 F2(g) → 2 NF3(g) ΔH° = –264 kJ/mol ΔS° = –278 J/(mol∙K) a. calculate the maximum amount of non-PΔV work that can be accomplished through this reaction at a temperature of 500°C. b. Determine the temperature at which ...
April 22, 2012

chemistry
N2(g) + 3 F2(g) → 2 NF3(g) ΔH° = –264 kJ/mol ΔS° = –278 J/(mol∙K) a. Using the information provided above (only), calculate the maximum amount of non-PΔV work that can be accomplished through this reaction at a temperature of 500&...
April 21, 2012

chemistry
For the titration of 50.00 mL of 0.1000 M ammonia with 0.1000 M HCl, calculate the pH (a) before the addition of any HCl solution, (b) after 20.00 mL of the acid has been added, (c) after half of the NH3 has been neutralized, and (d) at the equivalence point.
April 11, 2012

chemistry
When 50.0 mL of 0.050 M formic acid, HCHO2, is titrated with 0.050 M sodium hydroxide, what is the pH at the equivalence point?
April 11, 2012

Calculus
An open hemispherical bowl of radius R is slowly draining through a small hole of radius r in the bottom of the bowl. Let g be the acceleration due to gravity and y be the depth of the water (which means the distance from the water surface to the hole). Torricelliâ€...
April 8, 2012

Chemistry
What are the general equations for reaction of 1. Strong acid and weak base 2. Strong base and weak acid?
April 8, 2012

Calculus
The seesaw principle: As you probably know, any two persons can balance each other when sitting on opposite sides of a seesaw, regardless of their weights. It is only necessary that each person contribute the same moment — calculated by multiplying the person...
April 8, 2012

Chemistry
3. A chemistry student makes up a 0.10 M solution of NaF(aq) and finds the pH to be 8.09. a. Explain why the presence of F- in this solution affects the pH. b. Write out the acid/base equilibrium equation for the reaction of F- with water. c. Use the measured pH value to solve...
April 4, 2012

Chemistry
Calculate the concentrations of H2SO3, H3O+, HSO3-, and SO32- in a 0.025 M H2SO3(aq) solution
April 4, 2012

Chemistry
Write the equation for the equilibrium that exists when nitrous acid and sodium acetate are placed in solution together (do not include spectator ions). Using published values for the Ka of nitrous acid and of acetic acid, determine the numerical value of the equilibrium ...
April 4, 2012

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