Homework Help: Chemistry

Posted by Christian on Tuesday, March 1, 2011 at 12:51pm.

80.0 grams of KBr is mixed with sufficient water to prepare 1865 mL of solution. This solution is then mixed with 46.3 mL of 0.425 M KCl solution. 12 mL of this mixture is subsequently added to 61.0 mL of distilled water. Calculate the molarity of K+ ions in the final mixture? KBr and KCl dissolve in water according to the following processes.

KCl(s)+H2O(l) yields K+(aq)+Cl-(aq)
KBr(s)+H2O(l) yields K+(aq)+Br-(aq)

Chemistry - DrBob222, Tuesday, March 1, 2011 at 6:30pm
80g KBr/molar mass = moles KBr in 1865 mL.
Add moles KCl = M x L = 0.0463*0.425=??
Add mols KBr + moles KCl for total moles.
Add volume 1.865L + 0.0463L = total volume

Next step is to find how much is pulled from the solution. We took 12 mL; therefore, we took
moles in 12 mL = total moles x 12/total volume.
Then M = final mols/final volume in L.

Answer this Question

Related Questions

chemistry - A 25.0 mL sample of 1.00 M KBr and a 75.0 mL sample of 0.800 M KBr ...
Chemistry - Calculate the concentration, in molarity, of a solution prepared by ...
Chemistry - An unknown amount of water is mixed with 310 mL of a 6 M solution of...
Chemistry - An unknown amount of water is mixed with 310 mL of a 6 M solution of...
Calabasas HS - A 46.2-mL, 0.568 M calcium nitrate [Ca(NO3)2] solution is mixed ...
AP chemistry - 8.3 grams of NaCl and 3 grams of KBr were dissolved in 47 mL of ...
chemisrty - Q4) Suppose you prepare 950 mL of a solution by dissolving 100 grams...
math - 60 ml of solution A is mixed with 120 ml of solution B to produce ...
chemisry - An unknown amount of water is mixed with 350 mL of a 6 M solution of ...
Chemistry - How much volume (in mL) of 0.75 M K2SO4 (aq) and water must be mixed...

For Further Reading

First Name:
School Subject:
Answer: