Addition of phenolphthalein to an unknown colorless solution does not cause a color change. The addition of bromthymol blue to the same solution leads to a yellow color.

A)s the solution acidic, neutral, or basic?
B) Which of the following can you establish about the solution: a) a max pH b)a specific range of pH value c) a min pH
C) What other indicator or indicators would you want to use to determine the pH of the solution more precisely? (more than one may apply) alizarin yellow R, methyl violet, methyl red , or all the above.

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.

i believe it is 40–40–20%

explanation:

yes

explanation:

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