× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
A
6
j
6
c
5
m
5
C
5
d
5
s
5
n
4
i
4
d
4
d
4
J
4
Home Q & A Board Laboratory Help Introductory Courses
New Topic  
n_m_m n_m_m
wrote...
Posts: 22
Rep: 0 0
11 years ago
How many grams of sodium chloride do you need to make 100ml of a .10M solution? I tried using the formula M= Mass/volume but it wasn't giving me any of the answers shown. I think I just guessed and put .1000 or something like that. Could you please help me figure it out.
Read 613 times
4 Replies

Related Topics

Replies
wrote...
#1
11 years ago
100mL * 1L/1000mL * .10mol/L * 58.443grams/mol =.58443 grams (then round according to the number of significant figures...according to the way you presented this information, the rounded answer would be 6x10^-1 grams
wrote...
#2
11 years ago
First find moles NaCl needed.

Moles NaCl  =  Molarity of solution times the Volume in LITERS

so moles NaCl  =  .l0 M times  .1 liter   or   .01 moles

Now get moles into grams by knowing that moles times grams per mole = grams

so grams NaCl  =  .01 mole NaCl  times 58.5 g/mole   =   .585 grams
wrote...
#3
11 years ago
you're using the wrong formula, dude.
the right one is--
Molarity= (Given mass)/(Molar Mass) X 1/(Volume of solution)

Therefore,
0.10M=x/(58.4430 g/mol) * 1/(100 mL) * 10^3[since vol. of soln is in mL]
x=0.58443 g
wrote...
#4
11 years ago
M = moles/Liters

.1 = moles/.1

moles = .01

use the periodic table to get the molar mass of sodium chloride  (58.45grams/mole)

convert .01 moles to grams to get .5845
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  714 People Browsing
 116 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 114
  
 162
  
 77