acids

  1. S

    Anyone know where to get Nitrate Salt? Or how to make them?

    I've been looking for nitrate salts all over the web but can't seem to find anything. So please and thanks!
  2. A

    Dissociation of weak acids

    Hello, As a dietitian, I was taught during my training that weak acids never dissociate all at the same time, and that at any given point in time, some of it remains in acide form while the rest is deprotonized. Could anyone confirm that this is the case? Especially for lactic acid/lactate...
  3. C

    Amino acids, acidic basic or neutral

    I am having trouble solving the attached problem. I looked at the side chains to see if they were protonated or deprotonated to determine PH but I think I've made a mistake. Can someone help me with the attached problem? Thanks.
  4. E

    Conversion issue on Acids and Titratable acidity

    Hi All I am new here. I have one problem that I would greatly appreciate your help.I have data of citric acid (dominant acid) and two other acids (malic and glutamic)of a certain garden fruit measured by spectrophometric method and they are given in mg/gfw which is "miligram per gram of...
  5. P

    I need help with a task regarding acids and bases

    I am preparing for a test in the chapter about acids and bases, but there is one question that I am having difficulties finding the answer to. The question is a follows: A solution of sodium hydroxide is prepared by adding distilled water to 6.0 g NaOH to make 1.0 dm3 of solution. What is the pH...
  6. A

    Writing a chemical equation with polyatomics and acids

    The problems: (NH4)2S + HNO3 = ? - main problem LiHCO3 + HClO = ? - check just in case problem The attempt at a solution: I think it has to equal H2S + NH4NO3 Or H2S + NO2 + H2O I've used multiple online chemical balancing calculators and they all give me different answers. There's also...
  7. R

    Need help with acids and bases

    Ok, so I had a couple of problems that I didn't know the answers to in an acid and bases assignment and would really appreciate some help.. 1.What is the pH of an acid solution that has 1.0E-2 molar HCL? (I said it was "2") 2.What is the pH of a pure water solution at 25°C? (I said it was...
  8. B

    HELP - titration, graphs, pKa, acids >.<

    In my lab I titrated sodium hydroxide to 3 different types of acids. The first acid was hydrochloric acid, 2nd acid (monoprotic) acetic acid, and the 3rd (polyprotic) maleic acid. I'm told to find the pH at the equivalence points(s) and the pKa. How do I find equivalence points on a graph...
  9. A

    intermediaes/API /amino acids and peptide/ steroids

    Sunshine Chemical ltd. is a manufacturer of various special chemical products to various industries.Our main products include intermediaes/API /amino acids and peptide/ steroids and other fine chemicals,also undertake client-made synthesis & processing.Our R&D center is consists of doctor and...
  10. M

    D and L amino acids. Help :)

    Hello! So, i have a problem with this one. i was trying to go thru some chemistry problems in my book, and all was fine until i got to this task, and it goes as follow: Sometimes chemists need the unnatural D enantiomer of an amino acid, often as part of a drug or an insecticide. Most L-amino...
  11. M

    D and L amino acids. Help :)

    So, i have a problem with this one. i was trying to go thru some chemistry problems in my book, and all was fine until i got to this task, and it goes as follow: Sometimes chemists need the unnatural D enantiomer of an amino acid, often as part of a drug or an insecticide. Most L-amino acids...
  12. J

    Year 11 acids and bases help!

    This is not a homework question but I was just wondering if the way I answer questions to do with the neutralisation of acids and bases was right (specifically terminology) : Acids have H+ ions while bases have OH- ions. A neutralisation reaction occurs when the H+ ion and OH- ions cancel each...
  13. C

    Carboxylic, Hexose acids

    Where can I find a list of all Carboxylic acids and Hexose acids? Is there an easy way to tell them apart? Can a substrate be both? Can a Carboxylic acid also be considered a Dicarboxylic acid? I need a good resource to find differences between, say, Gluconic and Glucuronic acids. Some internet...
  14. S

    Name two enzymes that can synthesize nucleic acids?

    Name two enzymes that can synthesise nucleic acids. Briefly outline the reactions that they catalyse. Im thinking of rna-polymerase and dna-polymerase? would these be a good choice? This is what i have so far. bear in mind, it only needs to be very brief. One enzyme that can synthesise...
  15. S

    Amino acids structure.

    I'm really stuck on this question I have for college. To be honest, I dont think we have even covered this yet so I might be getting ahead of my self. The question is. Using structural formulae, write an equation which accurately describes the formation of the dipeptide Gly-Ala from the amino...
  16. P

    cleaning glass microfluidic channels

    Hi everyone! I want to clean my glass microchannels after they get clogged with dust that looks fiber-like, so I am assuming it is either from paper or cloth. Any suggestions? I have tried the usuals: NaOH, HCl. But none of them has convining dissolving results... any ideas? The channels are...
  17. H

    which acids dissolve&melt rocks?gold refinery & mining issue...

    Hi everybody ! I wonder are there any strong acids that can melt&dissolve hard rocks but not metals like gold.I found some rocks that contain gold metal and I want to get the gold out of the rock.You can even see the gold metal with naked eye,however conventional or classical methods are too...
  18. J

    Amino acids as acid/base

    How does the following reaction demonstrate an amino acid as an acid: H2NCH2COOH + CH3OH → H2NCH2COOCH3 + H2O How does the following reaction demonstrate an amino acid as a base: H2NCH2COOH + CH3COCl → CH3CONHCH2COOH + HCl An acid is a species that DONATES a proton and a base is a species that...
  19. T

    Oxidic acids in Bronsted-Lowry theory(question)... Help!!!

    How acidic oxides are defined in Bronsted-Lowry theory? I know an acid loses H+ and a base accepts it, but acidic oxides do not have H+ ! so how does it work? I mean for example in this equation: N2O5+H2O--->H+ + NO3- N2O5 doesn't have H+ to lose,so how do we call it an acid by Bronsted-Lowry...
  20. P

    Acids, Bases, and pH

    1. What are acids and bases? 2. What is pH and how is it measured? 3. What happens when substances with different pH levels are combined? 4. What is the pH of different foods? I would like as many of these questions answered as possible, with at least semi technical answers.. Id greatly...