Is adding the word "solution" necessary when listing the materials used in a synthesis? I am editing a chemistry-related paper and the synthesis procedure described is as follows: 


  Then, 10 mL of the intermediate were mixed with 10 mL of 1% (w/v)
  VCPL and 2 mL of 0.1% (w/v) KPS.


I was wondering if one should add the word "solution" after the name of the ingredients as follows:


  Then, 10 mL of the intermediate were mixed with 15 mL of a 2% (w/v)
  VCPL solution and 3 mL of a 0.2% (w/v) KPT solution.


I think that indicating a volume and a % (w/v) gives it away that you are referring to a solution containing the active ingredient, but should the word "solution" still be added?

Thanks.
No, the repeated addtion of the word "solution" is not needed.

All you want here is to provide a measured quantity (e.g., volume), concentration of your reagent in the solvent, and inferred quantity (e.g., mmol).  This may be reported in the following pattern, too:


  "1-Cinnamyl-4-methylbenzene (4a): The compound 4a was synthesized from
  1-methoxy-4-{[(2 E)-3-phenylprop-2-en-1-yl]oxy}benzene 2b ($\pu{240.9 mg}$,
  $\pu{1.00 mmol}$) with p-tolylmagnesium bromide 3a ($\pu{1.4 mL}$, $\pu{1.1 M}$ in THF, $\pu{1.5 mmol}$) in the presence of 1b ($\pu{4.1 mg}$, $\pu{1 mol\%}$) in $\ce{Et2O}$ ($\pu{5 mL}$) at room temperature for $\pu{24 h}$ ($\pu{198.0 mg}$, $\pu{95\%}$ yield, colorless liquid)."


(source: Hashimoto et al. in Molecules 2019, 24, 2296 (doi.org/10.3390/molecules24122296), section 3.2; open access publication.)

This pattern is seen for inorganic reagents like $\ce{HCl}$ dissolved in water, yet equally available in methanol, 1,4-dioxane, etc. (example); and organometallic reagents, e.g. butyllithium, methylmagnesium bromide.