Suppose that you start with .305g of copper. compute the theoretical yiled of the phosphate in the above procedure. based on what you saw as you performed the experiment, what practical obstacles are there to wighing the cooper(II) phosphate to check its actual yield?
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To compute the theoretical yield of copper(II) phosphate, we need to consider the balanced chemical equation for the reaction that forms copper(II) phosphate.
1) First, we need to determine the molar mass of copper to convert grams to moles. The molar mass of copper (Cu) is approximately 63.55 g/mol.
2) Next, we need to determine the molar mass of copper(II) phosphate (Cu3(PO4)2). The molar mass of Cu3(PO4)2 is approximately 380.58 g/mol.
3) Now, we can calculate the theoretical yield based on the stoichiometry of the reaction. The balanced chemical equation for the reaction between copper and phosphoric acid to form copper(II) phosphate is as follows:
3Cu + 2H3PO4 → Cu3(PO4)2 + 3H2
Since the stoichiometric ratio between copper and copper(II) phosphate is 3:1, and the molar mass of copper is 63.55 g/mol, we can calculate the theoretical yield as follows:
Theoretical Yield = (Molar mass of Cu3(PO4)2 / Molar mass of Cu) * (Amount of copper used)
Theoretical Yield = (380.58 g/mol / 63.55 g/mol) * 0.305 g
Now, let's calculate the theoretical yield:
Theoretical Yield = 1.25 g (rounded to two decimal places)
Based on what you observed during the experiment, some practical obstacles to weighing copper(II) phosphate to check its actual yield could include:
1) Loss of product during filtration: During the process of separating the copper(II) phosphate from the reaction mixture, some product might stick to the filter paper or be lost during transfer, resulting in a lower measured yield.
2) Moisture absorption: Copper(II) phosphate has the ability to absorb moisture from the atmosphere, which could artificially increase its weight when weighed. This can lead to an overestimated yield.
3) Contamination: The presence of impurities, such as leftover reactants or by-products, can affect the accuracy of the measured yield.
To mitigate these practical obstacles, it is essential to handle the product carefully, minimize product loss during filtration, ensure proper drying conditions, and conduct thorough purification steps to remove impurities before weighing the copper(II) phosphate sample.