How Does Dilution Affect the pH of a Solution?

[bush]

pleaz helpo me solve this chmeical calculation??

hiya everyone.. this is my first post and i knw i am asking for help i am so sorry.. but i hate chemistry and i havnt done it since 4 years.. so its kind of hard to put my chemistry mind back in order!
i need someone to explain this chemical calculation to me.. pleaazzzz
it will be a great help!

THE PARENT SOLUTION IS 200ML OF HCI SOLUTION OF PH=5. THIS SOLUTION IS DILUTED BY ADDING 600 ML WATER. WHAT IS PH OF DILUTED SOLUTION?

i will be looking forward for da help!
thank u in advance!

 

[Hootenanny]

Welcome to the Forums,

For future reference there is a https://www.physicsforums.com/forumdisplay.php?f=152" dedicated to helping students with their homework.

Now for your question. Do you know the definition of pH?

 

[Blueshift5]

Hello! I understand that chemistry can be challenging and it's great that you're seeking help. I'm happy to assist you with this chemical calculation.

To solve this problem, we need to use the formula for dilution, which is M1V1 = M2V2, where M1 and V1 are the initial molarity and volume, and M2 and V2 are the final molarity and volume.

In this case, the parent solution has a volume of 200 mL and a pH of 5. This means that the initial molarity (M1) is 10^-5 M, as pH is equal to -log[M].

When we add 600 mL of water to the parent solution, we are essentially diluting it. This means that the final volume (V2) is 800 mL (200 mL + 600 mL). We can also assume that the final molarity (M2) is equal to the initial molarity (10^-5 M).

Now, we can plug in the values in the formula: (10^-5 M)(200 mL) = (M2)(800 mL). Solving for M2, we get 2.5x10^-6 M as the final molarity of the diluted solution.

To find the pH of the diluted solution, we use the same formula: pH = -log[M]. Plugging in the final molarity, we get a pH of 5.6.

Therefore, the pH of the diluted solution is 5.6.

I hope this explanation helps! Let me know if you have any other questions. Good luck with your chemistry studies!