What is the volume of 5.5 M HCl solution if it is neutralized in a titration by 85.0 mL of 1.22 M Mg(OH)2?

0.38dm³ or 38mL

Explanation:

Given parameters:

molarity of HCl = 5.5M

volume of Mg(OH)₂  = 85mL

molarity of Mg(OH)₂ = 1.22M

Unknown:

Volume of HCl solution = ?

Solution:

we have to adopt the mole concept to solve this problem.

  Complete reaction equation:

     2HCl   +   Mg(OH)₂   →   MgCl₂   +  2H₂O

For a standard acid titrated against a standard base,

           aA + bB → cC + dD

A is the acid, B is the base

since number of moles = C x V

 C is the molarity

 V is the volume

     CₐVₐ / CₓVₓ  = a / x

 a = acid

 x = base

    85mL to dm³ = 0.085dm³

       since the unknown is Vₐ,

let us make it the subject of the expression;

             Vₐ =  (a/x)   x   ( CₓVₓ/ Cₐ)

              Va =   = 0.38dm³

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

i think it's c. i'm not sure but i think so.