Why is there phosphoric acid in soft drinks?

Phosphoric acid is a colorless, odorless crystalline liquid. It gives soft drinks a tangy flavor and prevents the growth of mold and bacteria, which can multiply easily in a sugary solution. Most of soda’s acidity also comes from phosphoric acid.

What is the concentration of phosphoric acid in Coca Cola?

The active acid in Coca-Cola Classic is phosphoric acid (H3PO4). The average amount per can of coke works out to 17mg per 100 mL of Coca-Cola. This gives an acidity of only 0.017%.

How do you test for phosphoric acid?

Place the crucible at 175~185℃, bake in an oven for 45 minutes, cool the glass crucible in a desiccator to room temperature and weigh. The phosphoric acid content is calculated as follows: H3PO4(%)=0.04428×(G2-G1)/G×50/500×20/500×100— the amount of sample taken.

Why is the third equivalence point of phosphoric acid not detectable in water?

The third pKa value for phosphoric acid is 12.4. The base used in the titration would have to exceed this value by about 2 pH units to produce the third equivalence point. NaOH at titration concentrations (0.1M – 0.5M) has a maximum pH of about 13 and therefore the third equivalence point is not shown.

Does Pepsi contain phosphoric acid?

The ingredients for Pepsi are carbonated water, high-fructose corn syrup, caramel color, phosphoric acid, caffeine, citric acid, and natural flavor (via TipHero).

Does Coke Zero have phosphoric acid?

Similarly to regular soda, drinking diet sodas like Coke Zero is associated with an increased risk of tooth erosion. One of the main ingredients in Coke Zero is phosphoric acid. One study on human teeth noted that phosphoric acid causes mild enamel and tooth erosion ( 13 ).

Is Coca-Cola acid or alkaline?

Coca-Cola is considered to be an acidic drink. Coca-Cola has a pH of about 2.3, which has about the same acidity as a lemon. Other types of Coca-Cola are very acidic as well. For example, Diet Coca-Cola has an acidity of 3.2, and Cherry Coca-Cola has a pH of about 2.5.

What is the concentration of coke?

Coke’s caffeine content is 34mg for a 12-oz can, and Diet Coke caffeine content is 46mg. That’s three to four times less than coffee! The same-sized coffee, in this case a 12-oz cup, has 140mg or more.

Why is phosphoric acid a good indicator for pH?

Phosphoric acid can be the weak acid in a weak acid-strong base titration. When the titration reaches the first equivalence point, the solution will contain the conjugate base H2PO4-. This will give the solution a pH greater than seven at that equivalence point.

What is the concentration of phosphoric acid?

The phosphoric acid solution usually contains 23–33% P 2O 5 (32–46% H 3PO 4). It may be concentrated to produce commercial- or merchant-grade phosphoric acid, which contains about 54–62% P 2O 5 (75–85% H 3PO 4).

Why does phosphoric acid have two equivalence points?

Diprotic and polyprotic acids show unique profiles in titration experiments, where a pH versus titrant volume curve clearly shows two equivalence points for the acid; this is because the two ionizing hydrogens do not dissociate from the acid at the same time.