I'm pretty sure this should be a fairly simple conversion factor problem, but I'm getting bad results.
I want to go from molarity (mol/L) to density. Based on simply unit analysis, I figured that I could go in this direction:
mol/L x g/mol x L/mL = g/mL
With the appropriate units cancelling out. However, I am given a problem concerning KOH with a molarity of .886 and and a density of 1.06 g/mL. I decided to verify my method using these numbers, but they don't work out right:
.886 mol/L x 56.11 g/mol x 1 L/1000 mL = .049 g/mL
Obviously I didn't get the desired result, so what did I do wrong?

aboo boo boo boo?

what????? don't post things if ur not going to help and sorry i don't kno chem

The problem is that you don't know the percent KOH (it isn't 100%). If you did, then
[density g/mL x 1000 mL x (%/100)/molar mass] = molarity.

For example, we have all of the above numbers EXCEPT percent so we can calculate that.
1.060 g/mL x 1000 mL x (%/100)/56.11 g/mol]=0.866 M.
So percent KOH = 4.58%
I hope this helps you see you didn't do anything wrong. You just made the assumption that the KOH solution was 100% KOH and that isn't so, otherwise, there wouldn't be any solvent (water) there. =)

  1. 👍 0
  2. 👎 0
  3. 👁 116

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    How are the two parts of a conversion factor related? Either the numerator or the denominator is one of the units needed for the converstion, then the denominator/numerator is the other unit needed. thanks. whats two conversion

    asked by Dennis on January 25, 2007
  2. Math

    Devon wanted to know if x−3 is a factor of f(x)=x^3+x^2−10x+8. She applied the Factor Theorem and concluded that x−3 is not a factor of f(x), as shown in the following work. f(−3)=(−3)^3+(−3)^2−10(−3)+8=20

    asked by kayla on March 13, 2020
  3. English Comp.

    (1) After Sean was arrested for breaking into a pawnshop, I began to wonder. (2) Why did some kids from my neighborhood end up in trouble while most of us didn't? (3) I started out with a question: What causes young people to make

    asked by Jasmin on October 14, 2015
  4. Science

    A student tried to solve the following problem by selecting the conversion below. What, if anything, did the student do wrong? How many moles of AgNO3 are needed to produce 6.75 moles of copper (II) nitrate Cu(NO3)2 upon reacting

    asked by Help on February 26, 2020
  5. Chemistry

    I Have Two Questions 1)How would you calculate the number of nanometers in 8.1 cm? 2)What is the equivalent of 0.35 lb in grams? You need to learn to do deimensional analysis. It's easy. 0.35 lb to grams We know there are 453.6 g

    asked by Bryan on January 25, 2007
  1. English

    Smells bad. Do you mind if I open the window? - I'm sorry but I do. I have a cold. ................................ What is the full form of 'Smells bad'? 1. It smells bad. 2. That smells bad. 3. ____ smells bad. Do you sometimes

    asked by rfvv on August 29, 2016
  2. Reaction Engineering

    The irreversible elementary reaction 2A ---+ B takes place in the gas phase in an isothermal tubular (plug-Jlow) reactor. Reactant A and a diluent C are fed in equimolar ratio, and conversion of A is 80%. If the molar feed rate of

    asked by Suleiman on May 25, 2016
  3. Geometry

    Find the area of the shaded region, if the rectangle has dimensions 8m and 18m and the circle is inscribed in the rectangle. I just need an example on how to solve for this. I'm pretty bad at following without examples and my book

    asked by Anne on July 14, 2016
  4. science

    what is a cladogram? explain how a scientist would use DNA or protein sequences taken from three different organisms to construct a cladogram. I'm pretty bad at short answer questions, and I have to get done with this test

    asked by cringe girl on May 15, 2020
  5. English expression

    Couldn't be better. Very good. Pretty good. Good. All right. Very nice. Nice. Very well. Well. Very fine. Fine. Not bad. Not to bad. So-so. Not fine. Not well. Not good. Bad. Pretty bad Very bad Terrible.

    asked by John on March 8, 2008
  6. Algebra

    What does it mean to be "simplified" which one is most "simple" 2(3+5) or 6 + 10 ??? I've been told both and wonder if someone can give me the correct answer some of my teachers told me simplified means all of the operations that

    asked by Kate on July 21, 2010

You can view more similar questions or ask a new question.