Rate of reaction: Factor of Concentration

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[Mohd Adhha Hussin]

Is there any difference between 50 cm³, 0.1 mol dm^-3 HCl and 25 cm³, 0.1 mol dm^-3 H₂SO₄ in terms of:
1. Concentarion of H⁺ ion and
2. Gradient of rate of reaction and
3. Is the calculation on no of mole of each acid reflect the concentration of H⁺ ion?

Need some advice on this....

[Kiu Toh Seng]

Is there any difference between 50 cm3, 0.1 mol dm-3 HCl and 25 cm3, 0.1 mol dm-3 H2SO4 in terms of:
1. Concentarion of H+ ion and
2. Gradient of rate of reaction and
3. Is the calculation on no of mole of each acid reflect the concentration of H+ ion?
 
Salam 1 Msia, my opinion:
1.Concentration of H+ ion per volume for H2SO4 is higher than.....
2.Rate of reaction for H2SO4 is higher than.....
3.For calculation total number of mole of H+ ion are same.

[Mohd Adhha Hussin]

 Salam 1 Msia, my opinion:
1.Concentration of H+ ion per volume for H2SO4 is higher than.....
2.Rate of reaction for H2SO4 is higher than.....
3.For calculation total number of mole of H+ ion are same.


[/quote]
So it means that the initial Rate of Reaction for H2SO4 is higher than HCl which means the gradient of it is steeper? How about the max volume of Hydrogen gas produced when it react with metal? Is it the max volume of gas from H2SO4 is same as HCl?

[Patrick Chai Teck Khiong]

Some opinion from me:
Yes sulphuric acid will give steeper gradient than hydrochloric acid with same molarity..Due to the same number of mole of hydrogen ion produced from the both acid, then the max volume of hydrogen gas produced will be the same.

[Wong Hee Ting]

My opinion

Sulphuric acid is diprotic acid:

H2SO4              --> 2 H+ _ SO4 2-
0.1 mol dm-3           0.2 mol dm-3  => higher rate, steeper gradient

mol = 0.005 mol       mol = 0.01 mol

=> the volume of gas (if react with metal) is the same because ratio of H2SO4 to H2 is 2:1.

[Jong Kah Yin]

Just offering my 2 cents' opinion :
1. Rate of rexn for H2SO4 will be higher - as sulphuric acid is a diprotic acid } concentration of H+  is higher than that of HCl (being monoprotic acid)
2. Gradient for the curve involving sulphuric acid will be steeper than that of HCl
3. The volume of gas produced are the same as the no. of moles of hydrogen gas produced are the same as per chemical equations involved
[assuming the metal is Mg in excess :]
2HCl        +     Mg   -->  MgCl2          +             H2
0.005 mol                                                    0.0025 mol

H2SO4      +       Mg      -->     MgSO4      +      H2
0.0025 mol                                                   0.0025 mol

[Kiu Toh Seng]

ya, right! tq sharing. God bless. Hav a nice day.

[Wong Hee Ting]

Yes, Mr Jong,

You are correct.

The ratio of acid and the gas should be compared. Thank you.

[Mohd Adhha Hussin]

Tq for all of u.... Now i am very clear on this

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