The reaction of cobalt(II) nitrate and potassium thiocyanate produces a coloured complex, [Co(SCN)4]2-(aq). The initial concentrations...
The reaction of cobalt(II) nitrate and potassium thiocyanate produces a coloured complex, [Co(SCN)4]2-(aq). The initial concentrations of the reactants after mixing (before any reaction) were 0.250 mol/L Co(NO3)2(aq) and 0.500 mol/L KSCN (aq). After 20 minutes, the absorbance of the solution was 0.825. The complex, [Co(SCN)4]2-, is the only absorbing species (ε b = 9.29 (mol/L)-1). Determine the concentration of...
please help. i will give you a thumbs up Exercise 5. How many mL of 1.20M...
please help. i will give you a thumbs up
Exercise 5. How many mL of 1.20M HCl would it take to just exhaust 100.mL of a buffer that is 0.300M in HCO3 and 0.200M in CO32-? a) Writoala balanced net ionic reaction that occurs when the HCl is added. b) What are the initial mmoles of CO2-before reaction? c) How...
Using the Arrhenius equation to calculate the activation energy. The rate constant of a chemical reaction...
Using the Arrhenius equation to calculate the activation energy. The rate constant of a chemical reaction increased from 0.100s-1 to 2.90s-1 upon raising the temperature from 25 to 45 C (1/t2 -1/t1)= -2.11x10^-4 K-1 Calculate the value of In (k1/k2) where k1 and k2 corresponds to the rate constant at the initial and the final temperature as found above. In(k1/k2)=??...
QUESTIONS For the reaction 2002-20 on teeds vessel with temperature held constant, the initial gas mature...
QUESTIONS For the reaction 2002-20 on teeds vessel with temperature held constant, the initial gas mature contains 0.755 M SO. 0.662 M 02, and no soy Album, It was found that 111 M 30, had been produced Calculate the concern of Oyun QUESTION 4 For the reaction 2020 adverse with temperature held constant, tegas more com 067 M 102.95M ,...
The gas phase decomposition of N2O5(g) àNO3(g) + NO2(g) is studied at a certain temperature, giving the...
The gas phase decomposition of N2O5(g) àNO3(g) + NO2(g) is studied at a certain temperature, giving the following data: Time (s) [N2O5] (M) 0.0 1.000 50.0 0.677 100.0 0.458 150.0 0.310 200.0 0.210 Is the overall order of reaction zeroth, first or second order? What is the rate constant (include units)? Calculate half-life (in s) for this reaction given the initial...
3. Consider the following general reaction, at room temperature: HClO2 (aq) + H2O (l) ⇌ H3O+(aq)...
3. Consider the following general reaction, at room temperature: HClO2 (aq) + H2O (l) ⇌ H3O+(aq) + ClO2–(aq) Ka = 1.2 x 10-2 Initially, a reaction contained 0.100 M HClO2 then it reached equilibrium. Set up an ICE table to calculate the [H3O+(aq)]. Using the “x is small approximation”, which of the following best describes the calculated percentage change in the...
If you have initial concentrations of I - = 0.029 M, BrO 3- = 0.028 M,...
If you have initial concentrations of I - = 0.029 M, BrO 3- = 0.028 M, H + = 1.8 x 10 -5 M, and S 2O 32- = 0.008 M, what is the concentration of I - when the solution turns blue? (iodine clock reaction) 6I-+ Bro3-+6H--> 3I2+ Br- + 3H20 (triiodide ion) I3-+starch = blue complex (couple reaction)...
Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form...
Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: ΔH∘rxn=ΔH∘f(products)−ΔH∘f(reactants) Entropy change, ΔS∘, is a measure of the number of energetically equivalent microstates...
Please answer all two questions and please explain! I'm completely lost at the moment and I'm...
Please answer all two
questions and please explain! I'm completely lost at the moment and
I'm not sure how to solve it. Please do it step by step if
possible.
10. (10 points) Account for the relative product distribution for the radical bromination reaction shown below. (a) Write the hydrogen abstraction step reaction (radical formation), including the transition state, that...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) The temperature of...
please help. i will give you a thumbs up
Exercise 5. How many mL of 1.20M HCl would it take to just exhaust 100.mL of a buffer that is 0.300M in HCO3 and 0.200M in CO32-? a) Writoala balanced net ionic reaction that occurs when the HCl is added. b) What are the initial mmoles of CO2-before reaction? c) How...
QUESTIONS For the reaction 2002-20 on teeds vessel with temperature held constant, the initial gas mature contains 0.755 M SO. 0.662 M 02, and no soy Album, It was found that 111 M 30, had been produced Calculate the concern of Oyun QUESTION 4 For the reaction 2020 adverse with temperature held constant, tegas more com 067 M 102.95M ,...
Please answer all two
questions and please explain! I'm completely lost at the moment and
I'm not sure how to solve it. Please do it step by step if
possible.
10. (10 points) Account for the relative product distribution for the radical bromination reaction shown below. (a) Write the hydrogen abstraction step reaction (radical formation), including the transition state, that...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) The temperature of...
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