What is the pH of a 4 mM HCl?

Answer 1

The pH is defined as the minus logarithm of concentration of H+ ions.

Since, HCl dissociates completely in water, the concentration of H+ ions will be 10M.

Therefore, pH = -log [H+] = -log 10 = -1.

Answer 2

when temperature is increased of a reaction by 10c ,then rate of reaction increases due to ?

a) net increase in Ea

b)increases in number of collisions

c) increases in fruitful collisions of reactants

d) Decreases in Ea

Q2;

AT which point heat absored without change in phaes ?

a) Melting point

b) boiling point

c) both

d) none

Q3;

London dispersion foreces exist in ;

a) in bromine water

b) in hcl

c) in molecules of Ne gas

d) in molecules of CH3CL

Answer 3

Because HCl is a strong acid it will dissociate completely in water to form hydronium ions. The pH can therefore be calculated by taking the negative log of the concentration.

pH=-log10

=-1

Therefore the pH is negative one. This indicates that it is a very strong acid. This value is also applicable even though it is outside of the standard scale.

Answer 4

The pH of a 4 mM HCl solution would be around 2.2. This can be calculated using the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. Since HCl is a strong acid that dissociates completely in water, the concentration of hydrogen ions in a 4 mM solution of HCl would be 4 mM.

Answer 5

4nM HCl = 0.004 M

-log(0.004 M)

= 2.4 pH

Answer 6

2

Answer 7

3