Question

a 68 ml aliquot of a 1.4M solution is diluted to a total volume of 288 ml a 144 ml portion of that solution is diluted by adding 173 ml of water what is the final concentration assume the volumes are dditive

Answer 1

`0.1501\ \text{M}`

Step-by-step explanation:

`68* 10^(-3)* 1.4=0.0952\ \text{mol}`

Concentration in solution

`(95.2)/(288)=0.3305\ \text{M}`

After dilution

`144* 0.3305=47.592\ \text{mmol}`

Total volume
`=144+173=317\ \text{mL}`

Final concentration
`=(47.592)/(317)=0.1501\ \text{M}`

The final concentration is
`0.1501\ \text{M}`