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!
Background: This problem deals with preparation of a standard solution of KNO3. To do this, you might transfer an exact mass of solid KNO3 to a volumetric flask, dissolve the KNO3 in water, and then dilute the solution to the mark on the neck of the volumetric flask. In this example the volumetric flask you want to use contains some old KCl solution. You will need to discard the contents of the flask, then rinse it once or several times, before proceeding to prepare the standard solution of KNO3. Your final KNO3 solution will contain some residual chloride, depending on the the effectiveness of your rinsing procedure.
A 500-mL volumetric flask containing 0.434 M KCl is emptied and allowed to drain briefly, leaving 1.14 mL of liquid in the flask. The flask is then rinsed by adding 87.5 mL of distilled water and is then used to prepare a standard solution of KNO3. Compute the molar concentration of Cl- in the standard KNO3 solution if the flask is rinsed only one time with distilled water.
Assume that 1.14 mL of liquid remains in the flask each time it is emptied, and that this volume of rinse water remains in the flask prior to preparation of the KNO3 solution. Although in practice rinse volumes are generally approximate, for purpose of calculation please use the exact volumes indicated.
1. H2O2(aq) acting as an oxidizing agent in acidic solution. Write the balanced half reaction?
What final temp. would be required to increase the pressure to 1 atm, the volume being held constant?
a gas mixture containing oxygen, nitrogen, and neon exerts a total pressure of 1.20 atm. If helium added to the mixture increases the pressure
In the Balmer-Rydberg equation, what value of is used to determine the wavelengths of the Balmer series?
Find the molarity of the carbonate in the solution. A solution is prepared by dissolving 11.60g of a mixture of sodium carbonate and sodium bicarbonate in 1.00 L of water. A 300.0-cm^3 sample of the solution is then treated with excess HNO3 and boi..
Calculate the concentration (M) of sodium ions in a solution made by diluting 70.0 mL of a 0.274 M solution of sodium sulfide to a total volume of 400 mL.
What mass of oxygen would be required to convert the same sample of nitrogen to nitrogen dioxide (NO2) instead?
A chemist titrates 20.00 mL of 0.2000 M HBrO ( Ka= 2.3 x 10^-9) with .1000 M NaOH. What is the pH? A) Before any base is added? B) When [HBrO] = [ BrO-] C) at the equivalence point
Using standard molar entropy values, calculate delta standard molar entropy values for the following reactions. In each case account for the sign of delta standard molar entropy.
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 400.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid.
How much energy (in Joules) is required to heat 14.89 g of water from 11.9 oC to 49.2 oC ? Use 4.184 J/goC as the specific heat capacity of water.
What is the mass in grams for each of the following: a) 5.12 mol of Al, b) .75 mol of Cu, c) 3.52 mol of MgBr2, d) 0.145l of C2H6O, e) 2.08 mol of (NH4)2SO4.
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