anonymous
  • anonymous
50 ML of 0.001 M phosphoric acid are exactly neutralized by the addition of 0.005 N Naoh the molarity of resulting salt is?
Chemistry
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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anonymous
  • anonymous
@Callisto help
Callisto
  • Callisto
Sorry.. I haven't learnt it :|
anonymous
  • anonymous
ok

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.Sam.
  • .Sam.
\[\begin{array}{c} \text{H}_3\text{P}\text{O}_4 \\\end{array}\text{ + }\begin{array}{cc} 3 & \text{Na}\text{O}\text{H} \\\end{array}\text{ $\longrightarrow $ }\begin{array}{cc} 3 & \text{H}_2\text{O} \\\end{array}\text{ + }\begin{array}{c} \text{Na}_3\text{P}\text{O}_4 \\\end{array}\] ------------------------------------ \[M_AV_A=M_BV_B\] \[\text{Molarity of base is}~~ M_B \] \[\text{Molarity of acid is}~~ M_A\] ------------------------------------ \[M_B=\frac{M_AV_A}{V_B}\] Sub in the values
Preetha
  • Preetha
Don forget the stoichiometric ratios. for every mole of phosphoric acid, you need 3 moles of NaOH to neutralize it. So you have to include that factor of 3 in the above calculation. It is a 1: 3 not 1:1 relationship. Try it and see.
anonymous
  • anonymous
@Kryten help!
anonymous
  • anonymous
as i see it you got all you need you just need to put numbers in.... only way to learn how to solve this kind of things is to do it yourself...
anonymous
  • anonymous
i solve it but not getting lol @Kryten thats why i called u
anonymous
  • anonymous
if u get after solving that then inform me
anonymous
  • anonymous
The answer should be 6.25 * 10^-4 moles
anonymous
  • anonymous
but i am not getting that @Kryten
anonymous
  • anonymous
this is really basic chemistry, begin with writing equation, then write down what you have and what you need and do the magic... put the relationships of reactants and products in equations and just crunch the numbers...
anonymous
  • anonymous
@.Sam. not getting the answer by ur way
anonymous
  • anonymous
@Kryten not getting!!!
anonymous
  • anonymous
i wrote the equation
.Sam.
  • .Sam.
6.25 * 10^-4 moles This is in moles, I thought you want molarity?
anonymous
  • anonymous
@Kryten do u have any idea
anonymous
  • anonymous
i am confused in question it is asked to find molarity but the answer is given in 6.25*10^-4
anonymous
  • anonymous
yea i have some idea but i gotta run students arent waiting i need to keep them safe... see you later
anonymous
  • anonymous
@Vincent-Lyon.Fr do u have any idea....
Vincent-Lyon.Fr
  • Vincent-Lyon.Fr
I won't answer any of your questions as you are pestering this study site without ever doing any effort on your own.
anonymous
  • anonymous
@Vincent-Lyon.Fr i did but not getting!
anonymous
  • anonymous
@open_study1 , my answer is same as @Vincent-Lyon.Fr 's
anonymous
  • anonymous
@shivam_bhalla i tried ny level best but i am unable,
anonymous
  • anonymous
@.Sam. and @Preetha have given you the valuable hints and tips . Just go ahead and solve it. you have to find the number of moles of H3PO4 initially reacting from given info
anonymous
  • anonymous
What's M and N?
anonymous
  • anonymous
M=molarity N=normality
anonymous
  • anonymous
moles = 5*10^-5 moles
anonymous
  • anonymous
Yes. Now continue and do the rest of the problem.
anonymous
  • anonymous
now wat to do
anonymous
  • anonymous
I'm sorry i don't know this :).
anonymous
  • anonymous
@shivam_bhalla r u there....
anonymous
  • anonymous
Plzzz help anyone plzz!
anonymous
  • anonymous
@Kryten HELP
anonymous
  • anonymous
I FOUNDED THE MOLE THEN WAT TO DO???
anonymous
  • anonymous
@Kryten PLZZ GUIDE ME PLZZ
anonymous
  • anonymous
OH........OH..........PLZZZZ SOME ONE HELP! I AM WAITING FOR 1 DAY PLZZZZ
anonymous
  • anonymous
5*10^-5 moles
anonymous
  • anonymous
in your place i would give up on pleading and solve it myself... you have been give instructions by multiple people and you just need to follow them, point is that you want it to be solved so you god forgive wouldnt have to hitch your little grey cells...
anonymous
  • anonymous
I DID IN THE WAY THEY GUIDED BUT NOT GETTING I FOUNDED THE MOLES THEN WAT TO DO PLZZ TELL ME THE STEPS I WILL SOLVE MY OWN @Kryten
anonymous
  • anonymous
first send some proof that you did anything (picture of paper of your tries) and then ill help. this is i think your third time you post this question and you just need to read what people have written... look up and read all carefully
anonymous
  • anonymous
0.15=0.005*V V=30ML
anonymous
  • anonymous
0.05 MILLI MOLES OF H3PO4 ON REACTING GIVES 0.05 MILLI MOLES OF NA3PO4 IE 5*10^-5 MOLES OF NA3PO4 ARE FORMED
anonymous
  • anonymous
@Kryten
anonymous
  • anonymous
DO U NEED MORE INFO?
anonymous
  • anonymous
now lets start from the begining write first what data you have, chemical reaction equation and then write what you need from data to be calculated
anonymous
  • anonymous
H3PO4 + 3NaOH ⟶ 3H2O + Na3PO4
anonymous
  • anonymous
WE HAVE TO FIND THE MOLARITY OF NA3PO4
anonymous
  • anonymous
write your data properly ex. c(X)= ... V(X)=... c(Y)=.... and then what you need to calculate ex. c(z)=?
anonymous
  • anonymous
WAT IS C(X)
anonymous
  • anonymous
that are examples how to write your data properly now lets see you do it
anonymous
  • anonymous
V(PHOSPHORIC ACID)=50ML M(PHOSPHORIC ACID)=0.001M N(NAOH)=0.005N M(NA3PO4)=?
anonymous
  • anonymous
IS THAT CORRECT.........
anonymous
  • anonymous
ok now lets see you have written N(NaOH)=0,005N --> that doesnt exist cause N(NaOH) is marking of number of NaOH atoms and it has no units, and furthermore write it one under another not one next to other cause that is vast. now lets see corection...
anonymous
  • anonymous
NORMALITY OF NAOH=0.005N
anonymous
  • anonymous
now please explain to me what is normality and then write all data again properly
anonymous
  • anonymous
NO OF EQUIVALENT OF SOLUTE IN ONE LITRE OF SOLUTION
anonymous
  • anonymous
ok now explain me the unit N what is its derivative
anonymous
  • anonymous
N= WG OF SOLUTE /(EQUIVALENT WG OF SOLUTE * VOLUME(L))
anonymous
  • anonymous
ok now when you explained it all carry on and write all data properly one item under other and under it all chemical equation
anonymous
  • anonymous
@Kryten ANYHOW THANZZZ I HAVE TO GO NOW PLZZ GIVE ALL THE HINTS I WILL LOOK IT AFTER WARDS............
anonymous
  • anonymous
no way, you will write all here so i see what you are doing...
anonymous
  • anonymous
hello
anonymous
  • anonymous
@Kryten
anonymous
  • anonymous
continue where you stoped, write all on one place...
anonymous
  • anonymous
thats all wat i knw
anonymous
  • anonymous
but you still havent written all in one place properly
anonymous
  • anonymous
oh....no wat else u want
anonymous
  • anonymous
i would like a cold bear and a steak but what you want is the question
anonymous
  • anonymous
this website was made to help!!!! so plzz
anonymous
  • anonymous
i am helping you but you are resisting to it... take a look how i solved your past questions where i photographed my work, it was all in sequence like it should be and that is the only way i will help you if you do it properly and as it should be solved and when you get that routine all this will be easy for you so your choice...
anonymous
  • anonymous
yes u helped me a lot earlier by risiking a lot but i want the reson now why u r not helping that way did any one force u???
anonymous
  • anonymous
such as @vincent fr @aravind etc......
anonymous
  • anonymous
no, but i realised that you are taking a path of least resistance which is not good... this site is for learning and not getting all solved with no effort...
anonymous
  • anonymous
now lets skip all the debate and tell me if you want to do it with my help properly or with no help at all
anonymous
  • anonymous
i want help
anonymous
  • anonymous
so whats the problem then... take a look how i solved your past questions and write it all like that here step by step and with understanding and reason why is it like it is for each step so that you LEARN how to solve problems like this...
anonymous
  • anonymous
ok let me try
ujjwal
  • ujjwal
Its been two days.. LMAO..
anonymous
  • anonymous
yes no one seems to help me........
anonymous
  • anonymous
Is the Answer 3.33 x 10^-4 ?

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