I want to check my answers to these problems? 1. What is the pH of solution when

Question

I want to check my answers to these problems? 1. What is the pH of solution when 0.025g of the strongacid HI is mixed into 25.0mL of solution? 2.What is the pH of solution when 0.100g of the strong baseKOH is mixed into 175 mL of solution? 3. How many grams of the strong acid HNO3 are requiredto make 75.0 mL of solution that has a pH of1.16?                                        mass of HNO2 in grams_____________ 4. 0.250g of strong acid HCI is mixed into water. How many mL of solution must be prepared if the HCI makes apH of 0.686?    mL of solution______________ 5. How many grams of the strong base NaOH are requiredto make 225 mL of a solution that has a pH of 13.50? I want to check my answers to these problems? 1. What is the pH of solution when 0.025g of the strongacid HI is mixed into 25.0mL of solution? 2.What is the pH of solution when 0.100g of the strong baseKOH is mixed into 175 mL of solution? 3. How many grams of the strong acid HNO3 are requiredto make 75.0 mL of solution that has a pH of1.16?                                        mass of HNO2 in grams_____________ 4. 0.250g of strong acid HCI is mixed into water. How many mL of solution must be prepared if the HCI makes apH of 0.686?    mL of solution______________ 5. How many grams of the strong base NaOH are requiredto make 225 mL of a solution that has a pH of 13.50?

Explanation / Answer

What I get is: 1. .025g/.025L = 1M = -Log(1M) = 0 pH 2. .100g/.175L = .57M = -Log(.57M) = .24 pH 3. 10^-1.16 = .069M = .069g/L x .075 L = .005g HNO3 4. 10^-.686 = .206M = .206g/L / .250g = .824L = 824 mL 5. 10^-13.50 = 3.16 x 10-14 M = 3.16 x 10-14g/L x .225L = 7.11 x 10-15 g Hoped this helped. =)

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