Yes, there are various things one can use to acidify irrigation water - I just suggest the diluted vinegar because it's something that people often already have to hand, and it's only for a three week test to see if it corrects the interveinal chlorosis. If it does then for plants in the ground the longer term (but not permanent) solution would usually be a soil application of sulfur.
Generally, although deficiencies in the soil can happen, the micronutients that are deficient in the plant due to soil pH are actually plentiful in the soil and only need the pH lowered to enable the plant to make use of them. Chances are it is not necessary to add those micronutrients as well. In some cases the pH cannot easily be lowered and then you'd maybe look at alternatives like foliar micronutrient application to bypass the soil pH, or chelated products.
In the field the ability to change the soil pH would indeed depend on the soil's buffering capacity, which is why you need to apply higher amounts of pH adjusting material to clay soils than to sandy.
Back to the vinegar, I actually saw an old article that was using acetic acid to prevent root rot, worked better than citric acid!
