Why add 10 ml distilled water in milk during determination of milk acidity?

Adding 10 ml of distilled water to milk during the determination of milk acidity helps to dilute the sample, allowing for a more accurate and consistent measurement of acidity levels. This dilution minimizes the viscosity of the milk, facilitating better mixing and interaction with the titrant used in the acidity test. Additionally, it helps to reduce the impact of fat content on the acidity measurement, leading to more reliable results.