Hello i had ordered a saree of rs 621 on 6th january 2018 from mirraw.com. My order no is 17419 and product ss56. I got my order on 13th january and it is entirely different from what i had ordered. So i returned back the product through professional courier with tracking number knp[protected] and it is already delivered to them.
Click for larger image. Acid and Base Indicators. Acid-Base Indicators: The most common method to get an idea about the pH of solution is to use an acid base indicator. An indicator is a large organic molecule that works somewhat like a  color dye. Whereas most dyes do not change color with the amount of acid or base present, there are many molecules, known as acid-base indicators, which do respond to a change in the hydrogen ion concentration.
In an acid-base titration, addition of titrant near the equivalence point causes the solution pH to change drastically. This pH change is detectable with indicators that change color as a function of pH. Indicators are weak acids that change color when they gain or lose their acidic proton(s).or titration of a strong acid with a strong base, the equivalence point occurs at a pH of 7. To reach the equivalence point in this example required 0.0350 mL of titrant, or 0.00350 moles of OH-. The titration shows that there were 0.00350 moles of acid in the original solution.