Answer / hari

H2SO4 is acid , when water is added to the acid it will
produce high energy , it is in the form of heat.So from this
we could not add water directly, we have to add it slowly
then we will neutralize the heat.

Answer / dinesh patil

Sulphuric acid has hydroscopic (Affinity towards water)
property. When we add water to acid due to hydroscopic
property it may suddenly comes out & may cause burning.

While mixing water & sulphuric acid we should always add
acid in water (with glass rod) & not to add water in acid.

Heat is genrated called as heat of neuterization which has
no relation with the addition

Answer / gopesh

Actually when water is added to sulphuric acid, a huge
amount of heat generates liable to crack the beaker
this is why when we need to dilute H2SO4 we take water in
a beaker and add acid slowly so that heat generation is
slow .

Answer / harsh

Since, acid is more viscous than water if we add water to
acid mixing will not be proper & thereby heat dissipation
becomes difficult. The added water takes away the
dissipated heat rapidly forming steam & creating a Flashing
or Explosion. Therefore water shouldn't be added to acid
and acid should be added to water for the dilution purpose.

Answer / sania

because on dilution of acid more amount of heat generate
which is harmful for human so water is not directly added to
acid

Answer / murthy

if water is added directly into large amount of H2so4, due
to heat of misibility water is vaporized, water required to
dilute greatly increases approximately 15-20 times .that is
why H2so4 is added to water and water is not added to h2so4.

Answer / sanjay kumar it-bhu

H2SO4 is highly acidic , when water is added to the acid it
will produce high quantiy of energy , it becomes violent
condition means break the beaker.So its dangerous for humen
so there should not be add water directly, we have to add
it slowly in dropwise manner then we will neutralize the
heat.

Answer / priyank sompura

because it is very concentrated so that for concentration
water is not directly used

What is the reason for removing silicon from aluminum?

3 Answers   IOCL, ONGC,

What is the chemical name of Silica gel?

2 Answers  

what is the purpose of capacitor? and capacitor load means what? how does it connect?

0 Answers  

PLEASE ANY ONE READ THIS MESSAGE ANSWER ME AT MY EMAIL ID surendrasaroj18@gmail.com sir i am prepairing for section engineer exam taken by railway my branch is chemical engineering i want previous paper of chemical engineering of section engineer exam taken by railway. please answer me as soon as possible thankyou

0 Answers  

Question 75 - The molecular weights M in kg / mol of 3 different monomers a, b and c in a polymer are Ma = 14, Mb = 16 and Mc = 18. The fraction of polymer chain X of 3 different monomers a, b and c in a polymer are Xa = 0.5, Xb = 0.3 and Xc = 0.2. (i) Calculate number average molecular weight by using the formula Ma Xa + Mb Xb + Mc Xc. (ii) Calculate weight average molecular weight by using the formula (Ma Xa Ma + Mb Xb Mb + Mc Xc Mc) / (Ma Xa + Mb Xb + Mc Xc). (iii) Calculate the polydispersity by using the answer in (ii) divided by answer in (i). (iv) If the molecular weight of repeat unit is 12, calculate the degree of polymerization by using the formula (Ma Xa + Mb Xb + Mc Xc) / (molecular weight of repeat unit).

1 Answers  

distance education chemical engineer degree aprooved courses any?

1 Answers  

Hi, I am Gurunathan. I am in need of ONGC, IOCL, DRDO technical test ( chemical engineering)and general aptitude questions. If anyone has kindly post it to me soon.

0 Answers   Nelco,

What is the ignition temp. of Aluminum,Coper&Iron.

0 Answers  

pls send me HPCL & reliance test paper for chemical engineering.....

4 Answers   BCPL, HPCL, NOCL, Reliance,

What are some of the consequences of an undersized kettle type reboiler?

0 Answers  

Is it ever advantageous to use shells in series even though it may not be necessary?

0 Answers  

What does Dew point -40C mean in an air drying unit.

4 Answers