Hey, I am having a real hard time getting the answers to the problems. Any help would be greatly aprreciated!

1. When 11 mL of a solution containing 2.9 M AlBr3 is diluted to 33 mL, a dilute solution is formed. What is the Br- concentration in 25 mL of the dilute solution?

2. A stock solution is prepared by adding 23 mL of 1.2 M AlCl3 to enough water to make 76 mL. What is the Cl- concentration of 40 mL of the stock solution?

3. When 26 mL of a 335 mL stock solution containing 2.01 M Na2S is diluted to 76 mL, how many moles of Na+ are in the new solution?

4. When 48 mL of a solution containing 4.1 M AlCl3 is diluted to 50 mL, a dilute solution is formed. How many moles of Al3+ ions are contained in 14 mL of the dilute solution?

5. How many milliliters of a 135 mL solution of 1.7 M Na3PO4 must be used to make 71 mL of a solution that has a concentration of .6 M Na+?

6. A 11 mL sample of a solution of AlBr3 was diluted with water to 21 mL. A 17 mL sample of the dilute solution was found to contain 0.047 moles of Br-. What was the concentration of AlBr3 in the original undiluted solution?

  1. 👍 0
  2. 👎 0
  3. 👁 107
asked by chelsea
  1. One question per post, please. Show your work. Jiskha is here to help you learn, not to do your homework for you.

    1. 👍 0
    2. 👎 0
    posted by drwls

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    Hey! I like math,but this year I'm doing algebra 1 and am not doing so well. I understand the lessons,but then the next day I learn a new way to solve a different problem and confuse the old way with this new way. So on tests,I

    asked by Lis on March 12, 2008
  2. metrics

    why is it so hard It isn't hard. It may be different and different things we deal with take some adjustments. Tell us what your problems are and perhaps we can tell you how we dealt with those problems the first time we

    asked by john on November 30, 2006
  3. Math

    I am having a hard time with these problems and could you show me how to work them so next time i will know how. find the first and third quartiles of Q and Q of the set of numbers 11,12,16,14,14,14,8,12,10,18 find any outliers (

    asked by Gertrude Sanders on November 8, 2008
  4. MATH

    cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems

    asked by George on July 15, 2011
  5. Chemistry URGENT

    I am having a hard time understanding how to calculate pH. my textbook states that that pH =-log[H^+]. I have two questions that asks: What is the H^+ concentration in an acid with of pH 4.6? Express your answer as a power of 10.

    asked by jazz on April 24, 2014
  6. Statistics-Probability

    An instructor will choose 3 problems from a set of 7 containing 3 hard and 4 easy problems. If the selection is made at random, what is the probability that only the hard problems are chosen?

    asked by Steven on February 5, 2013
  7. History 9th grade.

    Hey guys! I have a hard time on this question. I would really appreciate it if you could help me :) The question is: How did conflict and cooperation within early civilizations relate to the use of resources? The hard part is

    asked by Misty on September 9, 2017
  8. Algebra (need help ASAP!!!!)

    I didn't get how to do the problem. In my book it says to choose a variable and write an absolute value inequality that represents each set of numbers. Here are the problems I had-- all real numbers less than 2 units from 0 all

    asked by Emily on December 14, 2006
  9. Accounting ll

    This class is real hard, I'm a 9th grader, I'm real smart, but it's too hard, what am I supposed to do?

    asked by PLZ HELP on October 25, 2018
  10. Calculus 2

    Prove that "limit as n approaches infinity |x|^n/n! = 0 for all x" We are finishing up Maclaurin series but I'm still having a hard time working problems out. I have a quiz on these types of problems in a couple days so anything

    asked by ryancon on November 24, 2018

More Similar Questions