Dilution Exercises

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Exercise
Answer
What volume of water should be added to 400ml of a 0.1M NaOH solution in order to change the concentration to 0.075M NaOH.  
What volume of water should be added to 80ml of a 0.6M NaOH solution in order to change the concentration to 0.07M NaOH.  
50mls of water are added to 230mls of a 0.1M NaOH solution. What is the concentration of the solution ?  

A 1 litre vessel containing 0.5M NaOH solution is connected to a 2 litre vessel containing pure water via a valve (as shown above). When the valve is opened the solute dissolves evenly in both vessels. A sample of water is taken from the 2 litre vessel and analysed. What is the concentration of the sample?

 

A 1 litre NaOH solution is connected to a 6 litre vessel containing pure water via a valve (as shown above). When the valve is opened the solute dissolves evenly through both vessels. A sample of water is taken from the 6 litre vessel and analysed. If the concentration of the sample was found to be 0.45M calculate the concentration of the original solution in the 1 litre vessel?

 
What volume of water should be added to 200ml of a 0.01M NaOH solution in order to change the concentration to 0.0055M NaOH.
solution 
What volume of water should be added to 400ml of a 0.9M NaOH solution in order to change the concentration to 0.075M NaOH.
solution 

Home Concentration 8M Concentration 4M but the number of mole in total is still the same.