If a solution is made by dissolving 1g of NaCl in sufficient water to make 10g of solution, the composition of the solution is what % w/w?
My answer is 10% but I'm not sure if it is correct as it seems wrong to me. Can any one check this for me? Thanks to anyone who helps
looks good
Thanks for checking
To calculate the weight percent composition of a solution, you need to know the mass of the solute (NaCl) and the mass of the solution.
In this case, you have 1g of NaCl dissolved in sufficient water to make 10g of solution. First, find the mass of the water by subtracting the mass of the solute (NaCl) from the total mass of the solution:
Mass of water = Total mass of the solution - Mass of NaCl
Mass of water = 10g - 1g = 9g
Now, to calculate the weight percent composition, divide the mass of NaCl by the total mass of the solution and multiply by 100:
Weight percent composition = (Mass of NaCl / Total mass of the solution) * 100
Weight percent composition = (1g / 10g) * 100 = 10%
Therefore, your answer of 10% is correct! The composition of the solution is 10% w/w (weight percent).