Write the data provided, include the corresponding units. Use the provided data to complete this worksheet. Name : Section: Date: Grade: Experiment 11: Introduction to Precipitation Reactions and Limiting Reagents Remember that worksheets are individual work. A high percent yield can be due to the presence of impurities or a wet isolated product.

A low percent yield is probably due to the lost of product during separation or purification, or to an incomplete reaction. experimental yield - The percent yield = theoretical yield x 100 %. The experimental yield is the amount of product obtained in the lab in this case, isolated after filtration), when the experiment was performed. The amount of reagent in excess left unreacted is found from the initial amount of this reagent and the amount of this reagent used in the reaction. The least amount of product will be produced by the LR! The theoretical yield is the amount of product (in moles or grams) produced by the LR. Calculate the amount of product formed by each reagent and then compare these amounts. To find the LR use the definition of LR (use the main concepts!): “LR produces the least amount of product'. The other reagent is the 'Reagent in excess'. The LR produces the least amount of product. PROVIDED DATA: 1 Mass of the Na2CO3.H20, (g) 2.12 g 2 N Mass of the CaCl2.2H20, (g) 1.98 g 3 Mass of top funnel + filter paper, (g) 15.85 g 4 Mass of top funnel + filter paper +CaCO3 collected, (g) 17.81 g Notes for Calculations: Your calculations should be based on the correct balanced chemical equation. Data for Experiment 11: Introduction to Precipitation Reactions These are the data that you will use to complete the worksheet for the Introduction to Precipitation Reactions experiment.

Molar mass of caco3