In the lab you have 500 ml of a 0.45 M Na2HPO4 stock solution. If you take 10 ml of the solution and dilute to 250 ml, what approximate pH of the new solution? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. 4.7 b 7.5 8.3 9.8

Please help with questions 1& 2

calculate the pH of 20.00mL of a solution of acetic acid, HC2H3O2 0.105M with NaOH 0.105 M. For acetic acid, Ka = 1.8x 10 ^ -5 a) initial pHb) After adding 5.00 mL of NaOHc) After adding 6.00mL of NaOH   please give me step-by-step solution and circle answer please

My Questions b X VCU SONA FAFSA: Apply f X + X edugen/Iti/main.uni Return to Blackboard S Kime, Explorations in College Algebra, 6e Help | System Announcements PRINTER VERSION BACK NEXT Chapter 6, Algebra Aerobics 6.3, Question 05 A typical pH value for rain or snow in the northeastern United States is about 4.0. Is this basic or acidic? What is the corresponding hydrogen concentration? How does this compare with the hydrogen concentration of pure water? Round your answers to two decimal places when necessary Type: Hof the rain: x10-5 x10. This is H of pure water: than the concentration of the rain. LINK TO TEXT By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instructor. SUBMIT ANSWER SAVE FOR LATER Question Attempts: 0 of 5 used Earn Maximum Points available only if you answer this question correctly in three attempts or less. % powered by MapleNet 7:07 PM 10/14/2019 re to search