How many grams of hydrated MgSO4 ⋅ 5 H20 (M.W.: MgSO4 = 119, H20 = 18) are required to make a 10% solution of MgS04
depends on how much solution you want to make.
lets assume one wants a total of 1000g solution. ten percent of that is MgSO4, or 100/119 moles MgSO4. Now if that was previously added as the hydrated salt, then grams of the hydrated salt would have been (100/119)(119+5(18))=177 grams of the hydrated salt added to 1000-177 grams of water.
10% what? 10% w/w? 10% w/v?
I'll make two assumptions here.
1. You want a 10% w/v; i.e., weight/volume
2. You want this to be 10% w/v of MgSO4.5H2O. You flipped between MgSO4.5H2O and MgSO4 in your question.
% w/v = (mass solute/100 mL solution)
10% = [10 g solute/100 solution]
If you want % w/w, it is
%w/w = [(grams solute/total grams solution)]*100
Note: total grams solution means grams of the MgSO4.5H2O + grams H2O
To find out how many grams of hydrated MgSO4 ⋅ 5 H2O are required to make a 10% solution of MgSO4, we need to follow a step-by-step approach.
Step 1: Determine the mass of the 10% solution.
To calculate the mass of the 10% solution, we need to know the total volume of the solution. Let's assume we want to make 100 mL (or 0.1 L) of the 10% solution.
Step 2: Find the mass of MgSO4 required in the 10% solution.
Since the desired concentration is 10%, this means that 10% of the total mass of the solution should be MgSO4. Therefore, we need to find out what 10% of the total mass is.
Step 3: Convert the mass of MgSO4 to grams of hydrated MgSO4 ⋅ 5 H2O.
MgSO4 ⋅ 5 H2O is a hydrated compound, which means it contains water molecules. To convert the mass of pure MgSO4 to the mass of hydrated MgSO4 ⋅ 5 H2O, we need to consider the molar mass of water (H2O = 18 g/mol).
Step 4: Calculate the number of moles of hydrated MgSO4 ⋅ 5 H2O.
Using the molar mass of hydrated MgSO4 ⋅ 5 H2O (MgSO4 = 119 g/mol, H2O = 18 g/mol), we can now calculate the number of moles of hydrated MgSO4 ⋅ 5 H2O.
Step 5: Convert the number of moles to grams.
Finally, we can convert the number of moles of hydrated MgSO4 ⋅ 5 H2O to grams by multiplying it by the molar mass.
Following these steps will allow us to determine the number of grams of hydrated MgSO4 ⋅ 5 H2O required to make a 10% solution of MgSO4.