Acid Definition and 683 Threads

Hi, I've got this question where I have to describe two methods of measuring the pH of a substance. I've already got the one using electrochemical potentials, but I'm a bit stumped on the second method. What I've said is to carry out a titration with an alkali until the solution is...

Hello, A friend of mine has synthesized a compound with pentafluorophenyl groups, and is willing to characterize it via an additional 19F-NMR. However, the person responsible for recording NMR spectra is inexperienced in 19F-NMR, so we need help on recording the spectra. We have...

Hi Guys! cakculate the pH of a 0.1M acetic acid when it is half neutralized by NaOH solution (Ka= 1.7 x 10^-5) Ans: 4.7695 My dear friends! I am unable to understand the language of this question , Please tell me this question in some easier words so that i can just solve it on. A...

I dissolved some boric acid into some isopropyl alcohol and when I burned the solution the flame was green. I am guessing that I am not getting triisopropyl borate and that the flame just burns green due to the presence of borate ions in solution. Adding sulfuric acid would create the ester...

Which is more soluble in hexane, hexyl ethanoate or octanoic acid? I'm thinking it's octanoic acid with the longer uninterrupted hydrocarbon chain, where as the ester's longest uninterrupted hydrocarbon chain is composed of six carbons. Is this correct? If not can you please explain why? Thanks.

I have two organic compounds, Methanol and Methanamine (CH3OH and CH3NH2). The question is to predict their relative acidity. I reasoned in this way. Oxygen is more electronegative than hydrogen. So methanol will bond the hydrogen more tightly since bond strength is directly proportional to the...

Is 1-fluoroethanol significantly more acidic than regular ethanol? (Not just "slightly" more acidic) What about 1-chloroethanol? Is it significantly more acidic than regular ethanol? (see the attached image for structures of these molecules)

What is the chemical formula for oleic acid?

Does zinc react with both acetic acid (CH3COOH) and phosphoric acid (H3PO4)? I can't figure out the chemical equations for them and am wondering if no reactions occur. Thanks.

For cyclohexene and sulfuric acid reaction, is a precipitate suppose to form? the results looked yellow-orange ish, but it became murky. I'm suppose to note the solubility change, but i don't know what to say for it. Please help thanks. For Toluene though, i heated it as well, and there was...

I know that hydrochloric acid reacts with a heated mixture of iron and sulfur, but why does it not react with an unheated mixture of iron and sulfur? (During a demonstration, I could see a soggy mixture of the powder and fillings in the acid, and I noticed nothing so I am assuming no reaction...

Can mixing (in series) old cells with new cells of the same voltage and rating damage the new cell? If so why? The cells are recharable.

i need some helps...how does acid affect the ionization of water ? ...how does acid affect the ionization of water ? if there are more hydroximum ions in the solution,what will the change of ionization of water?

Why is it better to use phenolphthalein than bromothymol blue to determine the equivalence point which is equal to 7? bromothymol blue: 6.0 - 7.6 yellow @ blue phenolphthalein: 8.3 - 10.0 colorless @ pink

is the addition of bromine to trans-cinnamic acid syn or anti addition??

Can anyone here explain to me the role of auxin in cell's elongation? :confused: I think it's related to the acid growth hypothesis,but i need the explanation on how this hypothesis works. :rolleyes: thanks a lot for anyone who help :smile: o:)

Hello This is quite a simple question, but I am hoping someone has the time to help me with this. So, I have a question relating to lactic acid. Lactic acid (C3H6O3) -or 2-hydroxypropanoic acid- obviously has both a carboxyl group and a hydroxyl group. Now here's my question, should...

So this is probably going to look like a ridiculously easy question, but I'm stumped. I have searched for hours looking for a formula to use, and I've given up on my text. Question: A 0.1 mol/L aqueous solution of weak monoprotic acid has a hydrogen ion concentration of 0.001 mol/L. The...

a compressed spring is completely dissolved in acid what will happen to the elastic potential energy of the spring? With reasons. I think that the E.P.E will have an effect on the heat released but I still don't have backup. I am still not so advanced.

hi, iam doing a investigation in my chemistry class. this investigation is totally independent & there is very little help available frm the teachers. so for the investigation they have given some suitable topics on which i can do my practical & other stuff. the topic i choosed is CITRIC ACID...

I've posted this question in another thread... didn't get the answer though Why does a strong acid (or a base) ionizes to a higher extent? Is this extent of ionization the only criteria for characterizing an acid (or a base) as strong or weak. Is it the simple bond polarization phenomenon...

Can you burn gasoline to form nox witch can then be condensed with the other impurities to make dilute nitric acid witch could then be purified to make 63% nitric acid (by way of heating till smelling nitric vapors) it would make since that nox could be produced by burning gasoline because it...

I was recently reading about the method by which sulfuric acid was produced in the old days. Apparently, copper sulfate pentahydrate (green vitriol), when heated up, breaks down into copper dioxide, water, and sulfur trioxide. The sulfur trioxide and water then bond to form sulfuric acid...

If i have a reaction between iron(II) sulphate, sulphuric acid and potassium permanganate (KMnO4), what are the ions present in the salt??! similarly, if i have a reaction between nitric acid and copper solid, what are the ions present in salt? can nebody help me? thanks :)

Which of the following would be the strongest evidence in support of a scientist's contention that a local area was experiencing acid deposition? 1. An increase in the rate of photosynthesis of aquatic plants in a local lake 2. A sudden die-off of all the fish in a local stream 3. A gradual...

if we treat acetaldehyde with dilute base which out of the following two will be the major product: a}acetic acid b}alpha hydroxy butanal Ofcourse anyone would think of an aldol product which would be [B]beta hydroxy butanal[/B],but that is not given here,isn't there a slight chance that...

There are many different types of kidney stones, but the most common is calcium oxalate, CaC2O4. The pH range of blood is 7.2-7.3. The pH of urine ranges from 4 to 8. Draw the Lewis structure of oxalic acid (H2C2O4) and the oxalate anion (C2O4-2). H2C2O4 Ka1 = 5.6×10-2, Ka2=5.42×10-5...

Hey Guys, Sorry once again i am posting a thread of a boring topic, but seriously i couldn't find any information on the search engines that why i need your help on, the advantages and disdavantages of Citric acid in lemon juice. I found couple of sentences, but i don't know what it means...

Hey there ppl! I am doing an Acid/Base Titration to investigate whether the concentration of citric acid lemon juice, change over a period of 5 days. So i kindda need some help in this experiment, cause we are not allowed to ask our teacher any help! The main purpose of this experiment is that...

I don't undestand this question. How can i determine which will be the major component? HCl + Na2CO3 - > NaCl + H2O + CO2 Is it water?

Hi Does anyone know the reaction of an organic acid (carboxylic acid) with aluminium phosphate (AlPO_4)? If yes, please do let me know. Thanks and cheers Vivek

My friend and I are stuck on a lab-work, where we are to find the enthalpy of combustion for stearic acid. Does anyone know the reaction formula for the combustion of stearic acid?

Hi, I want to know what happens when a mixture containing aldehyde(s) and ketone(s) is introduced to a mixture of formamide HCONH_2 and formic acid HCOOH. Do both aldehyde and ketone react? Or does only one react? Eagerly awaiting a response... Thanks and Cheers Vivek

How does the absense of catalase cause lactic acid fermentation by bacteria? Also, what coenzymes/cytochromes do lactic acid-producing bacteria not have that may cause them to anaerobic?

The book that I have goes into very little detail about how to do these sort of problems. I know that you have to balance the equation at the end, which I can do. I do not know how to find the elements! :cry: (Besides the fact that Sodium Hydroxide is NaOH.) Can anyone help? THNX! :biggrin...

I see a lot of poisons that say do not induce vomiting. One such thing is phorsphoric acid. Why not vomit? Wouldn't that immediately get the poison out of your system?

1. Thionyl chloride is the double acid chloride of which acid? What are the products of its reaction with water? I think that it would be benzoyl chloride. The products are HCl and HOS(double bonded to O) and single bonded to Cl. 2. Account for the acidity of the...

What is the most powerful acid known? :bugeye: :devil:

Coursework time has hit me at college and no matter how much I hit the books the answer is not hitting me. It might be simple but I can't see it. Of course, the question is needed. I had to titrate sulphuirc acid with sodium hydroxide. Not hard to write coursework on and I am sure that if...

Got a question about the energy dissipated during the formation of hydrochloric acid, upon the reaction of hydrogen and chlorine (photochemical reaction). Whats the exothermic energy involved and the intensity of light needed to activate this reaction, in other words the activation energy. And...

from a series of reactions i got the formula which produces HNO_3... the "result" formula is: 4N_2_(_g_) + 6H_2_(_g_) + 8O_2_(_g_) -> 4HNO_3_(_a_q_) + 4H_2O_(_l_) The question asks to find the weight of nitrogen, and the Volume of nitrogen (at STP) required to produce 5.00 kg pure nitric...

Hi. I've problem with this question: How much Na2B4O7 * 10H2O and 20% hydrochloric acid solution is needed to make 31 g boric acid? My work: \frac{x}{Na_2B_4O_7 * 10 H_2O} = \frac {31}{4 H_3BO_3} x = 47.8 g \frac {0.2x}{3HCl} = \frac {31}{4 H_3BO_3} x = 275 g

I was thinking about make some HCl. My idea was to electrolys a NaCl solution and get a solution of H2 and Cl2. Then ignite the solution, which reacts and becomes HCl. Then I'll solute the gas in water. Will it work?

can pure molten hydrochloric acid conduct electricity?

for a weak monoprotic acid is the ratio \frac{[A^-]}{[HA]} always equal to 1? edit: never mind. answered my own dumb question. :bugeye:

coursework - unknown acid: tests - PLEASE HELP! can someone PLEASE help me?! as my username suggests...i am thick when it comes to Chemistry...so i really need some help with my coursework. basically i need to know the 2 chemical tests (without use of indicators) to test an unknown...

Hiya, Im trying to determine the initial molarity of an unknown acid, sooo I am trying to titrate it with standardized sodium hydroxide solution (0.1M). But I am having a load of problems figuring out what the heck I am supposed to do since i am told the acid is a weak acid. If I am...

I have a microsoft wireless mouse, now most of you would think that would be the problem lol, but seriously here is the problem: I have not used this mouse in a few months, because I could not find any batteries, but today, while looking at the mouse, I noticed that there seems to be some...

Hi ppl, Is propanoic acid stronger than ethanoic?Because propanoic acid has a longer R-group, it will have a greater inductive electron releasing effect than ethanoic acid, so the electron density is greater in propanoic acid than for ethanoic acid. With a region of greater e density...

CH3OOH (aq) + NH3 (aq) ‹———› NH4+ (aq) + CH3COO- (aq) Would the above reaction, involving acetic acid and ammonia qualify as a proper neurtalization reaction involving a weak acid and weak base? Or, would a reaction involving acetic acid and sodium bicarbonate be better? Regards