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Which one of the following salts, when dissolved in water, produces the solution with the highest pH. and WHY. KCl, KF, KI, KBr
A voltaic cell consists of a standard H2 electrode in one half-cell and a Cu/Cu2+ half-cell. Calculate [Cu2+] when Ecell is 0.25 V
The rate constant of the reaction: a. Depends on the concentration of reactants b. Describes the rate of the reaction when it reaches equilibrium c. Is a thermodynamic constant that is always true f
A student adds 33.0045g of potassium acetate to water and then adds 7.0 ml of 1.0 M HCl to this . the resulting solution is diluted to 250.0 ml calculate the PH of the resulting solution.
The decomposition of ammonia is 2NH3(g) = N2(g) + 3H2(g). If Kp is 1.5x10^3 at 400 degrees C, what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm
Net ionic equation for 2CH3COOH(aq)+ Sr(OH)2(aq)----> Sr(CH3COO)2(aq)+2H2O(l) Here's the hint the question came with: (hopefully this means something to you) - what are the two products of a neu
Pure tungsten melts at 3370 C . The liquid has a vapor pressure of 5 torr at 4337 C and of 60 torr at 5007 C calculate the normal boiling point of tungsten.
The result described is impossible, given the fact that delta G is -60 kJ/mol. d. The activation energy for the reaction is very large; equilibrium has not been reached by 24 hours. e. An enzyme has
The equilibrium contant Kc for the reaction HF(aq)+H20(l)-->H30+(aq)+F-(aq) is 3.5x10^-4. What is the equilibrium concentraction of H30+ if the initial concentration of HF is 1.0M
Determine the acid dissociation contant for a 0.10M acetic acid solution that has a pH of 2.87. Acetic acid is weak monoprotic acid.
Whats the reduced mass of CO2. I know how to do it for CO but since its 3 molecules do you go m1+m2+m3/m1m2m3 or is m2 just 32
Calculate the expected change in temperature for 1.7 g of NH4NO3 dissolved in 50.0 mL of H2O. Assume that the calorimeter absorbs no heat.
What is the hydronium ion concentration of a 0.100 M hypo hpyochlorous acid solution with Ka=3.5x10^-8? Given the equation for the dissociation of hypochlorous acid.
What are some factors to help you determine the relative strength of a base. For example, how would you know that NH2- is a very strong base. Or that OH- is a weaker base than NH2- And that CN- is a
The two electrodes Cr/Cr+3 and Sn/Sn+2 are combined to afford a spontaneous electrochemical reaction. The standard reduction potentials (volts) for Cr+3 and Sn+2 are -0.74 and -0.14, respectively. C
A 160.0 L helium tank contains pure helium at a pressure of 1870 psi and a temperature of 298 K. How many 3.5 L helium balloons can be filled from the tank
How many grams of pyridine are there in 100 mL of an aqueous solution that has a pH of 9.00? The Kb for pyridine is 1.9x10^-9
A solution of NaOH(aq) contains 8.0 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C
The human body is about 2/3 water. Sucrose is metabolized by the body. If the oxygen gas has a partial pressure of 162 Torr, what volume (at 37 degrees Celsius) is required for the metabolism reacti
The equilibrium contant Kc for the reaction HF(aq)+H2O(l)-->H30+(aq) +F-(aq) is 3.5 x10^-4. What is the equilibrium concentration of H30+ if the initial concentration of HF is 1.0M.
The following data was recorded. Solution: Relative Fluorescence A (standard oxidized) 62.4 B (standard, blank) 7.0 C (sample, oxidized) 52.0 D( sample, blank) 8.0 Calculate the vitamin B1 content o
Rank PhCH3, Ph2CH2, and Ph3CH in order of acidity Rank the following compounds from most acidic to least
An atom of aluminum (Al) has a diameter of about 1.2 10-8 cm. (a) What is the radius of a(n) aluminum atom in Angstroms (Å)? Å What is the radius of a aluminum atom in meters
How many aluminum atoms would have to be placed side by side to span a distance of 6.0 µm atoms (c) If the atom is assumed to be a sphere, what is the volume in m3 of a single aluminum atom
As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon