# How Much Precipitate Forms in a Copper Sulfate and Sodium Hydroxide Reaction?

• Zoey Brown
In summary, a solution of copper 2 sulphate is prepared with 5.80g of the substance and 125ml of water. When a 25.0ml sample is added to 125ml of 0.125 mol/L sodium hydroxide, a precipitate of cu(OH)2 forms. To calculate the mass of the precipitate, the limiting reagent must be determined between NaOH and copper 2 sulphate. The answer of 0.762g does not take into account the specific form of the copper 2 sulphate used.
Zoey Brown

## Homework Statement

A solution of copper 2 sulphate is prepared by placing 5.80g of copper 2 sulphate in a flask and adding enough water to prepare 125 ml of solution. When a 25.0ml sample of this solution is added to 125ml of 0.125 mol/L sodium hydroxide a precipitate forms. Calculate the mass of the precipitate formed in the reaction.

n=cv
m=nM

## The Attempt at a Solution

The percipitate i found would be cu(OH)2 which would have the same mole as NaOH (n=cv) and then u would use the formula m=nM to find mass. The answer i got is 0.762g but i didnt use any info about the copper 2 sulphate, is this right?

You have to find what is the limiting reagent - it can be NaOH, it can be copper sulfate.

I find the question ambiguous - it doesn't say whether it is a copper sulfate pentahydrate (the most common form) or the anhydrous form.

## What is a solution?

A solution is a homogeneous mixture made up of two or more substances, where one substance (the solute) is dissolved in another substance (the solvent).

## What is a precipitate?

A precipitate is a solid substance that forms when two solutions are mixed together, causing a chemical reaction and the formation of an insoluble compound.

## How can you determine if a solution is saturated?

A solution is considered saturated when it contains the maximum amount of solute that can be dissolved in a given amount of solvent at a specific temperature and pressure. This can be determined by adding more solute to the solution and observing if it dissolves or forms a precipitate.

## What factors can affect the solubility of a substance?

The solubility of a substance can be affected by temperature, pressure, and the nature of the solute and solvent. Generally, increasing temperature and pressure can increase solubility, while the nature of the substances can vary greatly and affect their ability to dissolve in each other.

## How can you separate a precipitate from a solution?

A precipitate can be separated from a solution through various methods such as filtration, centrifugation, or decantation. These methods involve physically separating the solid precipitate from the liquid solution through different techniques.

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