acid base K K₂b name formula name formula 10 nitrous acid HNO₂ 4.5 x 10 aniline |C HạNH, | 4.3 × 10 acetic acid HCH3CO₂ 1.8 x 10-5 methylamine CH3NH₂ 4.4×10 4 se this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to e solution that will have the next lowest pH, and so on. solution pH 0.1 M C6H5NH3Br ✓ choose one 1 (lowest) 0.1 M KCH3CO₂ 2 3 0.1 M CH3NH3CI 4 (highest) 0.1 M NaNO₂ choose one

Acids & Bases: Understanding Connections Between Descriptions of Weak Acid Dissociation In an aqueous solution of a certain acid the acid is 0.054% dissociated and the pH is 4.49. Calculate the acid dissociation constant Ka of the acid. Round your answer to 2 significant digits.

In order to determine the Ka of HXO₂, a scientist prepared a HXO₂ solution with a pH=3. If the scientist determined the Ka to be 1.2 X 10⁻⁵, what was the molarity of the acid he started with? (If you use any assumptions, be sure to check that they are valid!)  Round the final answer to the three decimal places.

can you help me on the second problem please

Determine the pH, pOH, [H+], and [OH-] for each of the following problems. We may assume each acid base listed will 100# dissociate.

A solution is prepared that is initially 0.38M in ethylamine (C₂H5NH₂), a weak base, and 0.12M in ethylammonium chloride (C₂H5NH₂C1). Complete the reaction table below, so that you could use it to calculate the pH of this solution. Use x to stand for the unknown change in [OH-]. You can leave out the M symbol for molarity. initial change final [C,HẠNH,] 0 0 [C,HẠNH] 0 0 [OH-] 0 010 X Ś

Which of the following statements about acids is true? o The conjugate base of a strong acid will significantly raise the pH of water O For a polyprotic acid, the first H* dissociation has the smallest K, O The conjugate base of a weak acid is a stronger base than H2O All of the other statements are false For a weak acid, the equilibrium [H3O]* = initial [HA]

The pH of an aqueous solution at 25.0 °C that contains 3.98x10-9 M hydroxide ion is 6.50. TRUE OR FALSE

A solution is prepared at 25 °C that is initially 0.48 M in diethylamine ((C,H5)¸NH), a weak base with K,=1.3 × 10 -3 and 0.024M in diethylammonium bromide ((C,H5) NH,Br). Calculate the pH of the solution. Round your answer to 2 decimal places. pH olo Ar

Construct the expression for Ka for the weak acid, NH4+. 1 Based on the definition of Ka, drag the tiles into the numerator or denominator to construct the expression for the given acid. [H₂O] 2[OH-] [NH3]² NH.(aq) + H2O(I) = HO-(aq) + NH3(aq) [H3O+] 2[NH] [NH₂-]² Ka = [OH-] 2[NHs] [NH] 2[NH₂] [NH3] [H₂O]² [NH₂-] [H3O+]² 2[H₂O] [OH-]² ✓ RESET 2[H3O+] [NH