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Determine the value of the equilibrium constant (report your answer to three significant figures) for the following reaction if an equilibrium mixture contains 0.010 mol of solid PbI2,and is 0.0100
A 2.00g sample of acetylsalicylic acid, better known asaspirin, is dissolved in 100mL of water and titrated with0.200mol/L NaOH(aq) to the end point.
As you progress down the periodic table, elements become better and better nucleophiles. They also become better and better at leaving groups. The heavier elements are more reactive than the lighter
A 0.567g sample of an unknown acid known to donate 3 protonsper molecule, requires 42.1mL of a 0.119mol/L sodium hydroxide solution for neutralization. Calculate the molecular weight of the acid.
A solution is made by taking 100.0 ml of 2.0 *10^-2 molar NaOH(aq)and mixing in 50.0 mL of 3.0*10 ^-2 molar HCl (aq). The acidity ofa small portion was tested using tyrolian blue indicator, for whic
Prepare a written plan for making up 100.0mL of 0.100M KIsolution.(note the list of reagents and equipment provided on the preceding) Include in your plan the exact amount of KI that you will need t
A sample of primary standard grade K2Cr2O7 (MM = 294.20) weighing 0.2153g is dissolved, the solution acidified and excess KI added. The liberated I2 requires 44.86ml of the Na2S2O3 for titration.
Experiment result: Concentration of HC2H3O2 = 0.00855 mole HC2H3O2/ 0.0100L(10mL) solution =0.855M The manufacturer's vinegar used in this experiment claims that the vinegar contains 5% acetic acid
A 25.0 g piece of Aluminum (which has a molar heat capacity of 24.03J/Cmol) is heated to 82.4C and dropped into a calorimeter containing water (specific heat capacity of water is 4.18 J/gC) initial
How many grams of helium must be added to a balloon containing 8.00grams Helium gas to double its volume? Assumeno change in temperature or pressure.
The pKa values for H2SeO3 at25oC are 2.64 and 8.27. Write the base-hydrolysis equilibrium equations forSeO32-(aq) and HSeO3-(aq) ions, and calculate the equilibrium constant values
Household vinegar is composed ofHC2H3O2 and water. It has adensity of 1.05 g / mL. Calculate the percent by mass of aceticacid in the household vinegar.The calculated molarity of the household
The active ingredient in a bleach is sodium hypochlorite (approc 5.35m/v%). What is the molarity of this sodium hypochlorite (NaCL) solution?
If the acceptable buffer range ofthe buffer solution is ± 0.10 pHunits, calculate how many moles of H3O+ can be neutralized by 250 mL of the buffer.
We prepare a buffer by addind 0.200 mol hydrazine (N2H4) and 0.600 mol hydrazinium idodide (N2H5I) to 1.00 L of solution. What is the pH of this solution?
The pH at one half the equivalence point in an acid-base titration was found to be 6.57, what is the value of Ka for this unknown acid?
0.50 mol CCl4 gas is introduced into a 10.0-Lflask. What fraction of the total volume of the flask is occupied by CCl4 molecules? (Value of Van der Waalsconstant b for CCl4 = 0.138 L/mo
If 30.15 mL of 0.0995 M NaOH is required to neutralize 0.216gof an unknown acid, HA, what is the molecular weight of the unknown acid?
A solution is prepared by dissolving 10.00 grams of a monobasic salt in a total volume of 1.0 liters. the ph of this solution was measured at 13.07 and a conductivity experiment determined that this
If 14.40 grams of KCl are dissolved in water to make a solution of0.154 L, the density is found to be 1.069 g/cm3.Calculate the molality of the solute.
Calculate the energy needed to raise the temperature of a850 g block of aluminum from 22.8oC to94.6oC. Calculate the molar heat capacity of aluminum.
A 311 g sample of water absorbs infraredradiation at 1.06 x 104 nm from a carbon dioxidelaser. Suppose all the absorbed radiation is converted to heat.
0.200 moles of an unknown monobasic weak base are added to 1.20 Lof water. The resulting solution has a pH of 9.300. What is the Ka of the conjugate acid of the unknown base? Assume no change in vol
What would be formed if ester ethyl propanoate was treated with sodium ethoxide; resulting in a claisen product after work up with dilute acid. Please show the reaction.
Calculate the wavelength (in nanometers) of a photon emitted by ahydrogen atom when its electron drops from the n =6 state to then = 2 state. In nanometers...