Quantitative Analysis- Titration

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Presentation transcript:

Quantitative Analysis- Titration Quantitative Analysis determines the quantity (amount) of an element or compound in a sample. That could mean finding the concentration of acid in vinegar, the concentration of ore in a rock, the amount of aspirin in a tablet, the concentration of alcohol in wine or the amount of vitamin C in orange juice.

Jenny Suo (L) and Anna Devathasan test the vitamin C content in the Ribena drink at the science lab of Pakuranga College on March 29, 2007 in Auckland, New Zealand. The maker of Ribena has been fined $217,500 in the Auckland District Court after admitting it mislead customers about the vitamin C content of the blackcurrant drink. The charges arose from an investigation by teenage Pakuranga College students Anna Devathasan and Jenny Suo into the vitamin C levels of the popular Ribena drink.

Acid-Base Titration To start our titrations, we need a base solution of known concentration (standard solution). The base needs to be a dry solid that can be weighed accurately. It also needs to dissolve easily in water. We will use sodium carbonate (Na2CO3).