Question

Helpppp helpppp plsssss

A volume v =40ml of distilled water is added to volume vi =10ml of sugar_water solution of concentration ci=0.3mol.L-1

1) calculate the concentration cf of obtained solution

2) deduce the number or factor of dilution? ​

Answer 1

`\Large \text{1)}`

`\textbf{Use the formula and substitute the values}`

`\displaystyle 0.3\ mol/L = (n \ mol)/(10 * 10^(-3)\ L)`

`\textbf{Solve for the number of moles}`

`n = 0.003\ mol`

`\textbf{Calculate final volume }`

`40+10=50\ mL`

`\textbf{Number of moles remains same. Solve for concentration}`

`\displaystyle C=(0.003\ mol)/(50 * 10^(-3)\ L) =0.06\ mol/L`

`\Large \text{2)}`

`\displaystyle DF=(V_f)/(V_i)`

`\displaystyle DF=(50)/(10)=5`