# Chemistry 12

posted by .

calculate the Ph of a solution composed of 0.75 grams of KOH dissolved in 500ml of water. assume total ionization.

• Chemistry 12 -

KOH ==> K^+ + OH^-
mols KOH = grams/molar mass = ?
M KOH = mols KOH/L solution = ?
pOH = -log(KOH)
Then pH + pOH = pKw = 14. You know pKw and pOH, calculate pH.

## Similar Questions

1. ### Chemistry

A sample of KHC2O4 weighing 0.5839 g is dissolved in 25 mL of water and an endpoint is reached when 31.99 mL of KOH has been added. Calculate the molarity of the KOH solution. KHC2O4(aq) + KOH(aq) ¨ K2C2O4(aq) + H2O(l) because the …
2. ### Chemistry

Calculate the [H3O+] when 1.65 grams of KOH are dissolved in 500.0 mL of solution
3. ### ap chemistry

A sample of KOH is dissolved into 100.0 grams of water in a coffee cup calorimeter. if the dissolution produces 6.45 kJ of heat and the temperature change is 25.4 degrees celcius to 40.0 degrees celcius, how much KOH (in grams) is …
4. ### chemistry

What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O?
5. ### chemistry

What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O?
6. ### chemistry

What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O?
7. ### chem

a.)How many moles of NaOH are required to prepare 2.00L od 0.380M solution?
8. ### chemistry

A compound was found to be composed of the following amounts of elements: 20.00% wt% C, 26.64wt% O, 46.65 wt%N, and 6.71wt%H. A 6.125 grams sample of this compound dissolved in 46.205 grams of water as a solution was found to have …
9. ### chemistry

I have the answers, I am just interested in the formulas so that I can solve the problems, thanks! 1. Find the boiling point of a solution composed of 110g of HgCl2 (a non-ionizing solute) in 175g of water. 2. Find the freezing point …
10. ### chemistry

Calculate the pH of 0,3g calcium hydroxide dissolved in water to give 500ml solution.

More Similar Questions