Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The quantity of antimony in a sample can be determined by an oxidation-reduction titration with an oxidizing agent. A 8.75 g sample of stibnite, an ore of antimony, is dissolved in hot, concentrated HCl(aq) and passed over a reducing agent so that all the antimony is in the form Sb3+(aq). The Sb3+(aq) is completely oxidized by 43.2 mL of a 0.115 M aqueous solution of KBrO3(aq). The unbalanced equation for the reaction is
BrO3-(aq)+Sb3+(aq)?Br-(aq)+Sb5+(aq)(unbalanced)
Calculate the amount of antimony in the sample (in grams) and its percentage in the ore.
A piece of iron weighing 85.690 g was burned in air. the mass of the iron oxide produced was 118.350 g. What are the moles of iron in the original sample
If 18.4mL of 0.800M solution are needed to neutralize 5.00mL of a household ammonia solution, what is the molar concentration of the ammonia?
The change in heat for the solution proecss when solid sodium hydroxide dissolves in water is 44.4 kj/mol. when a 13.9 g sample of naoh dissolves in 250.0 g of water in a coffee cup calorimeter, the temperature increases from 23.0 degrees C to how..
The vapor pressure of a solution containing 53.6 g glycerin (C3H8O3) in 133.7 g ethanol (C2H5OH) is 113 torr at 40 degrees Celsius.
How efficient is the extraction of tea leaves containing 1.0 g of caffeine with two 30-mL portions of chloroform over that of a single step extraction (K25ºC = 8.36)?
Calculate the pH of the solution after 30.0 mL of acid have been added; pKb of (CH3)3N = 4.19 at 25°C.
If 7.36 g of an unknown gas occupies 79.1mL at 25.02 C and 7.55atm pressure, explain what is the molecular weight of that gas. The value of R = 0.0821 L atm mol-1 K-1.
Chloroform is an excellent solvent for extracting caffeine from water. KD = 9 for caffeine in chloroform-water at 25 degrees celecius. What weight of caffeine would be recovered from a solution of 4.0 g caffeine in 100 mL water by a single extract..
A sample of soil from a newly discovered cave is analyzed by a team of explorers. They find an element that is a good conductor of electricity. It also forms a chloride in the form XCl2 and an oxide in the form XO.
The two-wire unit is placed in a uniform magnetic field of magnitude 0.400 T such that the angle between the direction of I1 as well as the magnetic field is 68.5°. While we don't know the current in wire 2, we do know that it is smaller than the..
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.
Why did the UN initiate a project to develop a global harmonized system for classifying and labeling hazardous substances and mixtures - Describe the required elements to go onto an OSHA compliant label and explain the purpose of each.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd