Rate constant for a second order reaction
The rate constant for the second-order reaction is 0.80/M*s at 10 degrees C 2NOBr(g) goes to 2NO(g) + Br2 (g) (a) Starting with a concentration of 0.071 M, calculate the concentration of NOBr after 25 seconds (b) Calculate the half-life when [NOBr]0 =0.081M (c) Find the half-life when [NOB ...continues
Back-calculating Ksp values when solubilities are known?
I want to calculate the Ksp values for 3 carbonate compounds when the solubilities are known. K2CO3 = 112 g/100 ml Na2CO3 = 30 g/100 ml CaCO3 = .001 g/100 ml For CaCO3 I understand how to set up the solubility equation as: [Ca^+2][CO3^-2]/[CaCO3] But I always get confused about di-protic compounds like K2CO3 and N ...continues
The equilibrium constant for Kc for the reaction shown is 54.3 at 430 degrees C. H2(g) = I2(g) = 2 HI(g) At the start if the reaction there are 0.714 moles of H2, 0.984 mole of I2 and 0.886 mole of HI in a 2.00 liter reaction chamber. At equilibrium, what are the concentrations of the gases- [ ...continues
1. Write the balanced equation for the first step in the reaction between vinegar and baking soda, with carbonic acid (H2CO3) as a product. What type of reaction is this? 2. Write the balanced equation for the second step in the reaction, the liberation of carbon dioxide from carbonic acid. What type of reaction is this? 3. Wr ...continues
Differences between aluminum sulfate and aluminum hydroxide as a flocculant in water treatment?
Can aluminum sulfate and aluminum hydroxide be used interchangeably as a flocculant and have the same effectiveness when attempting to floc various cations and anions that are in the form of dissolved solids? Or does the presence of the SO4^-2 ion vs. the OH^-1 ion have more floc capability because of its larger ionic charge? ...continues
Five physical chemistry questions.
5) Ozone decomposes to oxygen according to the balance chemical equation below: 2O3 ---> 3O2 If the rate of disappearance of the ozone is -7.2E-4 M/s, what is the rate of formation of oxygen? 6) If 100kJ of heat is added to 54.0 g of water at 100°C, what is the final state of the water? MW H2O = 17.9 g/mole 7) How many ...continues
Crystal Field Theory: High Spin and Low-Spin Complexes and Isomers of Cooordinate Compounds.
1 (a) Write a structural formula for two different isomers of [Co(H2O)2(en)2]Cl2. Indicate the oxidation state of the Co in each case. (b) For the complexes in (a) above, draw a crystal field energy level diagram for either isomer, and indicate the electron distribution for (i) a high spin complex, and (ii) a low spin complex ...continues
Separating and Testing Sodium Carbonate, Chloride and Sulphate
Assuming an imaginary mixture of sodium chloride, sodium carbonate and sodium sulphate I need to know what test to use to 1st confirm the the compostion and 2nd to find the percentage composition mixture. I need to know which test would be useful and the calaulations needed so I can preform the in the lab.
Chemical structure for hydrated zinc borate?
The plant that I work at uses a zinc borate (US Borax) compound whose chemical formula is 2ZnO-3H2BO3-3.5H2O ----- essentially a hydrated mixture of zinc oxide, boric acid, and water to form the granular zinc borate.We use it as a wood preservative and must keep it in an insoluble form in our process chemistry. My question ho ...continues
Calculating solubility of zinc oxide, boric acid, and aluminum sulfate at different pH values
Hope you can help....I've always struggled calculating solubilities of compounds at different pH's. I have 3 separate but related questions: 1) 1000 g of zinc oxide is added to a 1 liter container of pH neutral water (pH 7.0); the solubility of the ZnO is given as .29 g/L at pH 7.0; how much more ZnO would dissolve if the pH ...continues
