You have 100.0 ml of a solution of hydrochloric acid that has a ph of 3.00. you add 100.0 ml of water to this solution. what is the resulting ph of the solution?

3.30

Explanation:

Original volume of the HCl solution = 100.0 mL

pH of the solution = 3.00

Concentration of the hydrogen ions can be calculated as:

pH = -log[H⁺]

So,

3 = - log[H⁺]

[H⁺] =  10⁻³ concentration units.

For original acid solution:

C₁ = 10⁻³ , V₁ = 100 mL

For 10% acid solution :

C₂ = ? , V₂ = 200 mL  (100 mL of water is added to 100 mL of original solution)

Using  

C₁V₁ = C₂V₂

10⁻³×100 = C₂×200

C₂ = 0.5×10⁻³ concentration units.

So,

pH is :

pH = -log[H⁺] = -log(0.5×10⁻³) = 3.30

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).