You should not be adjusting the pH levels in home canning recipes. Recipes are tested scientifically to be safe when prepared using home canning equipment and techniques. Follow a tested recipe and adjust only the spices.
Titratable acidity & Total acidity in wine: Total acidity: proton equivalence of the amount of organic acid anions present in a wine. It is the number of protons + dissociation. Titratable acidity: number of protons recovered during a titration with a strong base to a specified endpoint. It can also be expressed as a molar quantity. Many people use titratable acidity and total acidity as synonyms, but they are not. The titratable acidity is always less than the total acidity, because not all of the hydrogen ions expected from the acids are found during the determination of titratable acidity. However, titratable acidity is easier to measure.
with the pH scale
Gastric juice consists of hydrochloric acid, a strong acid along with many weak acids. Free acidity is a measure of acidity of hydrochloric acid alone but total acidity is a measure of combined acidity due to hydrochloric acid and many weak acids (organic acids and proteins).
for set yoghurt : Ingredients : including Total solids, fat , protein , casein/whey , hydrocollolidprocessing :Homogenization pressure, pasteurization temperature and time , de-aeration and acidity.
A measure of the total concentration of the strong acids in the effluent of the cation exchanger resins is the Free Mineral Acidity.
Titratable acidity of fruit juices is an important parameter in determining fruit maturity and sour taste in citrus fruits.
The titratable acidity in the aqueous phase of a soil. it may be expressed in millequivalents per unit mass of soil or in other suitable units. it is the portion of total acidity that exist in the form of acid both ionized or non ionized.
There are two fundamentally different methods of expressing acidity: (a) titratable acidity expressed as percent lactic acid, and (b) hydrogen ion concentration or pH. The former measures the total acidity but does not measure the strength of the acids. The pH indicates the strength of the acid condition.
By titration with alkaline on methyl-red indicator (pH<6)
Baking soda can be used to control acidity in swimming pools. Baking soda controls the Total Alkalinity Soda ash raises the pH or reduces the acidity.
In field experiment
The ingredients that you have listed are, flour, cocoa and granulated sugar. Therefore, the amount of ingredients are 3.