1. A

    determination of Na2CO3 and NaOH in Zn/Ni elecrtolyte

    Hi all, my name is Ana and I am new hear. I work at chemical lab and I have a problem with determination amound of Na2CO3 in presens of NaOH in Zn/Ni electrolyte. Could you help me? The method who we use is: 1./ 5 ml of sample is add in 250 ml conical flack. Then we put 100 ml H20 and...
  2. H

    How to neutralise NaOH and Na2SO3 solution

    Hello I need help to find out how to calculate acid volume to neutralise alkaline solution of 0.5mole NaOH and 0.5mole of NaSO3. I am going to use HCl probably about 28%. The solution is used for desalination of metal objects. The capacity is about 250litres. I will be appreciated for help and...
  3. A

    Calculate the label concentration of the NaOH solution

    I've been stuck on this question for hours now, I dont really know where to start and I was wondering if you guys could help me out The concentration of a solution of NaOH of unknown concentration was determined in the following titration: 25.00-mL aliquots of the NaOH solution, measured by...
  4. H

    Calculating amount of NaOH to raise pH of solution

    I need to get a 5 wt% NaCl solution within the pH range of 6.5 - 7.2 to meet specifications for a test. After initial mixing, the pH of the NaCl solution typically measures around 6. I'm assuming that the slight acidity of the solution is due to carbonic acid, from carbon dioxide in the air...
  5. D

    pH on addition of NaOH

    Hi there, I have a question which I am terribly stuck on! I feel as though I have tried almost everything and cannot get any of the options given . I would appreciate any help that I can get! I have attached the question below. I used the Henderson-hasselbach equation pH=pka + log [A-]/[HA]...
  6. C

    NaOH Safety

    Hi all, I'm preparing to experiment with alkaline hydrolysis of polyethylene terephthalate largely using NaOH in a solution at around 100 celcius. Sodium Hydroxide (Lye, Caustic Soda) is dangerous and I don't fancy any Fight Club style burns. What types of gloves and neutralizing options are...
  7. C

    KHP and NaOH Titration Problem :(

    I recently did a Titration Lab. I titrated 1.00 mL of KHP solution with 0.1M NaOH. The results: 4.5 mL of NaOH needed to reach the equivalence point (used indicator). I need to figure out the [HP]...HOW DO I DO THIS? I'm so confused....Please help :(
  8. Y

    pH problem with HCL and NaOH?

    anyway me and my friend both got different answers. In an acid-base titration. 1.0 mol litre hcl(from burette) is added slowly to 20 ml of 1.0 mol litre solution of NaOh in conical flask. a) calculate the pH of the solution in the conical flask after 19.90ml of HCL has been added. b) calculate...
  9. C

    How to find pH.

    I need help in finding the pH when you add 2mL of .1M NaOH to 20 mL of Lactate Buffer. I dont know where to start please help.