A colorless household solution was tested with three indicators shown above. The solution was colorless (7) with phenolphthalein, yellow (5) with bromothymol blue, and orange (3.5) with methyl orange. What is the pH of the solution?

The pH of a 500.00 mL buffer solution containing sodium mandelate and mandelic acid (ka= 3.89x10-4) ((a,=0.90 Please fill in the space with a numerical value with two digits or decimal places without units

An aqueous solution of an unknown solid salt was placed into five different test tubes. Into each test tube a couple of drops of different indicators were then added to each test tube and the color of the indicator in the solution was recorded as shown below. What is the approximate pH of the solution? Test pH Acid Base Color in Unknown Indicator tube Range Color Color Solution 3.0 - 1 Methyl orange 4.4 Red Yellow Yellow 3.0 - Congo Red Purple Red Red 5.0 Bromcresol 3.8 - Yellow Blue Blue Green 5.4 Bromthymol 6.0 - 7.6 4 Yellow Blue Yellow Blue 8.2 - Phenolphthalein Colorless Blue Colorless 10.0 4.3 O 8.4 O 5.2 6.7

16.19 A diprotic acid, H₂A, has the following ionization constants: K₁₁= 1.1 × 10¯³ and Kå,= 2.5 × 10¯6. Ka In order to make up a buffer solution of pH 5.80, which combination would you choose? NaHA/H₂A or Na₂A/NaHA.

What is the pH of a solution prepared by mixing 20.0 mL of 0.50 M NaOH and 35.0 mL of 0.50 benzoic acid solution? (Benzoic acid is monoprotic with a Ka of 6.5 x 10-5.)

Three titrations were performed using 0.0250M aqueous H2SO4 1) 14.97 mL, 2) 15.01mL and 3) 15.02mL were required to neutralize 10.0 ml of an aqueous solution of KOH.  What is the molarity of the KOH solution?

What does the pKIn of an acid-base indicator mean and how does it help in choosing an appropriate indicator for a certain titration ?

Can you please help me on this i really need help on it!

100 mL of 0.10 M NH3 (Kb = 1.8 x 10-5) are mixed with 100 mL of 0.10 M HCN (Ka = 4.9 × 10-10). Which statement is true? (3) The resulting solution is neutral O (2) The resulting solution is basic O (4) No answer is correct as not enough information is given. O (1) The resulting solution is acidic E D Moving to the next question prevents changes to this answer. 4 R F % S T G 6. & 7 H C 8 00 K M Question 2 of 37