please i need the answer within five minutes

Chemistry
Tutor: None Selected Time limit: 1 Day

What is the final molarity when 40.00 mL of a 0.803-M HClO4 solution is diluted to 660.00 mL?

Calculate the molarity of diluted NaSCN if 20.00 mL of 0.351 M NaSCN is transfered to a 100.00 mL volumetric flask, diluted to the mark and mixed well? 

Dec 11th, 2014

The molar of HClO4=0.803x40x10-3=32.12x10-3 mol

So the final molarity of HClO4=32.12x10-3 mol/660.00x10-3 L=0.0487 mol/L=0.0487 M


The molar of NaSCN=0.351x20x10-3 mol

So the final molarity=0.351x20x10-3/100x10-3=0.351/5=0.0702 M

Dec 11th, 2014

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Dec 11th, 2014
...
Dec 11th, 2014
Feb 21st, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer