solutions

  1. P

    1:1 Solution from Solutions of Two Different Ratios

    I searched to see if I could find a similar problem posted to no avail, so apologies if this is a repeat. It's been a few years since my chemistry degree, and anyway I don't think I had ever seen this problem before now. I have two solutions with two compounds of interest, each, call the...
  2. H

    Calculate the volumes of solution III required to make up the standard solutions?

    I.60 mL of Fe(NO3)3 (0.20 M in 0.50M HNO3) for standard solutions II. 70 mL of Fe(NO3)3 (2.0 x 10^-3 M in 0.50 M HNO3) for unknown solutions III. 60 mL of KSCN (2.0 x 10^-3 M in 0.50 M HNO3) for both standard and unknown solutions IV. 100 mL of HNO3 (0.50 M) as solvent Find the volume of...
  3. T

    Help with Solution Preparation!

    How many mL of HCl would I need to dilute in a 0.2% sodium bicarbonate solution to create a 100mL solution with a pH of 3? of 5? How many mL of NaOH would I need to dilute in a 0.2% sodium bicarbonate solution to create a 100mL solution with a pH of 9? of 11? Thanks so much!
  4. brandonz

    Identifying Solutions

    Hello all I received a lab from my teacher on identifying solutions using qualitative analysis. My question is which tests can I do to find the remaining ones? The solutions given to us were: water, sodium hydroxide, H2SO4, copper II sulfate, copper II nitrate, silver nitrate, calcium chloride...
  5. M

    how to make solutions

    How would you make 1.00 L of 0.500 M NaCl from pure NaCl? How would you make 5.00 L of 0.750 M HCl from 2.00 M HCl?
  6. M

    determine small amount methanol in solutions

    i like homebrewing but i don't know how to realize my homemade alcohol is safe even existing small volume of methanol has high risk to make someone blind i have tested my alcohol with red litmus paper but methanol and ethanol bout of them make it blue so this not good method. i added dicromate...
  7. S

    Lost in my bio 113 (but actually chemistry) class?

    So I'm enrolled in a biotechnology summer institute at my community college this semester and the first day they tossed us right into something we weren't expecting - Chemistry. After all, the class we're enrolled in is Biology 113 and Bio 113 lab. So needless to say myself, and my entire class...
  8. S

    Lost in my bio 113 (but actually chemistry) class?

    Hi! So I'm enrolled in a biotechnology summer institute at my community college this semester and the first day they tossed us right into something we weren't expecting - Chemistry. After all, the class we're enrolled in is Biology 113 and Bio 113 lab. So needless to say, myself and my entire...
  9. F

    Identification of salt solutions

    Recently, we had a laboration where you were to identify different salt solutions. The following chemicals were involved: * water (deionized) * CH3OH * diluted NaCl-solution * saturated NaCl-solution What happens when you mix them (in pairs, inter alia; CH3OH+H2O), and why? I do have my...
  10. I

    Inogranic Chemistry Miessler,Tarr Solutions Manual

    Do you have Miessler-Tarr solutions manual e-book. Or any place where I can find it online. I need immediately. I can purchase it as e-book.
  11. P

    Please help with solutions type problem!

    A 100.0 mL solution of a weak base was titrated with 0.200 M HCl. A volume of 48.00 mL of the 0.200 M HCl was? needed to reach the stoichiometric endpoint. After 24.00 of the 0.200 M HCl had been added, the pH of the titrated solution was 10.00. A. Determine the pKb for this base. B. Calculate...
  12. L

    Rank these solutions from highest to lowest ph?

    Rank the following aqueous solutions from highest to lowest ph. All solutions are 0.10 M. If there are two substances in a solution, assume they are 1:1 mole ratio. Please show your work! :) a) CH3COOH and NaCH3COO b) NaOH and NaCl c) NaOH and HCl d) NH3 e) HCl and CH3COOH f) NaCH3COO
  13. A

    Buffer Solutions??

    So I'm in the midst of writing up a labreport for a buffer solutions lab. I've done all the work, but im skeptical of my workings, as the answers seem to not be correct.. I shall post a general list of my workings, if anyone spots something wrong please post what it is. Thanks ...
  14. H

    Finding mass of glucose in standard solutions

    his is for an experiment that separates sugars in a sample using TLC. We are given a glucose standard solution with a concentration of 1mg/ml as well as 3 standard sugar solutions (glucose, fructose and maltose) all with the same concentration (10mg/ml) in 10% v/v isopropanol) We are asked to...
  15. S

    Buffer solutions calculations

    This the question: Q) You need 100 ml of 200 mM phosphate buffer and you have two stock solutions from which you can make the buffer; 0.8 M NaH2PO4 (the acid form) and 0.8 M Na2HPO4 (the base form). You need to add 3 times more of the acid form than the base form to achieve the desired pH. How...
  16. N

    Seperating Ions in Solution

    I only have two of these question but am totally confused by both. My teacher isn't the best and I'm taking the course online so it doesn't help any. Here is an example of how the question should be properly done (as I find people generally have a hard time conveying what my teacher is trying...
  17. T

    Buffer Solutions

    What volume of 0.250 mol/L Ca(CH3COO)3 (calcium acetate) solution should you add to 25.00 mL of 0.500 mol/L CH3COOH to prepare a buffer solution which has a pH of 4. 754? Answer = 25.0 mL This is what I did: Ca(CH3COO)2 --> Ca2+ + 2CH3COO- due to mole ratio 0.250x should be muplipled by 2 to...
  18. P

    Preparing Solutions and Dilutions

    I am trying to figure out how to make the correct solutions for my chemistry experiment. "To prepare your solutions, you will need to weight out quinine sulfate and dilute it in an aqueous solution of .05M H2SO4. Calculate the volume of H2SO4 (12mol/L) that you will need to prepare 250mL of a...
  19. S

    Equation from 2 solutions

    Im confused as how to go about this question. Mixing 5ml of .1M HF with 2 ml of .1M NA2S I need to write the equation of that of the result. I believe its 2HF+Na2S -> 2NaF +H2S but im not really sure i found the moles of both solutions but after that im stumped. Help please!
  20. H

    buffer solutions

    Which combination of substances, when mixed, would not give a buffer solution? 1) 25cm3 of 0.1 moldm3 of HCl and 50 cm3 of 0.1 moldm3 NH3. 2) 25 cm3 of 0.1 moldm3 NaOH and 25 cm3 of 02 moldm3 NH4+ 3) 25 cm3 of 0.1 modm3 of HCl and 12.5cm3 of 0.1 moldm3 CH3COO-Na+ 4) 25 cm3 of 0.1 moldm3 NaOH...