• Support PF! Buy your school textbooks, materials and every day products Here!

Standard Addition Chemistry problem

  • Thread starter xsc614
  • Start date
  • #1
11
0

Homework Statement


hw10.jpg



Homework Equations


Not completely sure, but I believe equation is:
Cx = bCs/mVx
cx = concentration of sample
b= y-intercept
cs= concentration of standard
m=slope
Vx=volume of sample


The Attempt at a Solution


I plotted the values on a graph with Absorbance on the Y-axis and [Pb] added on the X-axis, and put a trendline extending through the X axis. Eqn I came up with is y=.209x+2.211

My teacher was very vague with standard addition and through searching the web it said the best way to figure out the initial concentration is through spiking the samples. I am really not sure where to else to go with this problem since my equation above has several variables that aren't given in the problem statement (volume, concentration of standard).

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
chemisttree
Science Advisor
Homework Helper
Gold Member
3,363
390
Well? X in this case represents the added lead in mg/mL. What would the value of y represent when x=0?
 

Related Threads on Standard Addition Chemistry problem

  • Last Post
Replies
2
Views
4K
Replies
4
Views
1K
  • Last Post
Replies
1
Views
5K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
2
Views
2K
Replies
8
Views
3K
Replies
15
Views
21K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
1K
Top