Kimia Akhir Tahun SMA 60 Jakarta

From the Bronsted-Lowry acid-base reaction equation above, which is the Bronsted-Lowry acid-base pair in order?

• NH3 and H2O

• H2O and OH-

• HCl and H2O

• H2O and NH4+

• HCl and NH4+

Consider the two acid solutions that have the same pH! If the concentration of CH3COOH is 10-1 M (Ka CH3COOH = 1×10-5) and HNO3 is 10-3 M, the most accurate statement regarding these two solutions is...

• the concentration of CH3COOH solution and HNO3 solution is the same

• the number of moles of CH3COOH is equal to the number of moles of HNO3

• the concentration of H+ in both solutions is the same

• the PP indicator will turn red in CH3COOH solution

• the volumes of both solutions are the same so their anion concentrations are also the same.

Based on the table above, it can be concluded that the strength of the acid...

• HR > HP > HK

• HN < HM < HQ

• HN > HP > HL

• HS < HR < HP

• HM < HL < HS

Into 100 mL of distilled water, 0.37 grams of Ca(OH)2 (Mr = 74) is added (the volume of solid Ca(OH)2 is neglected) and stirred until completely dissolved. The pH of the Ca(OH)2 solution is...

• 1 + log 5

• 3 + log 5

• 5 + log 1

• 12 + log 5

• 13 + log 1

A student makes a buffer solution with pH = 9 from the available substances, namely 1M NH3 solution (Kb = 1×10-5) and NH4Cl salt crystals (Mr = 53.5). The steps are as follows: taking 1 L of NH3 solution, weighing 5.35 grams of NH4Cl and mixing it into the NH3 solution, stirring until all the crystals dissolve. After measuring, it turns out that the pH of the formed solution is not as expected. The step that deviates from this process is...

• the concentration of NH3 used is too small

• the mixture must be heated first

• the NH3 solution used is too little

• the mass of NH4Cl that was weighed should be 0.53 grams

• the NH3 solution used should be 100 mL

Based on the data above, the solution that is acidic is...

• Solution 1

• Solution 2

• Solution 3

• Solution 4

• Solution 5

If Ba(OH)2 solution is considered to be completely ionized, the pH of 2 liters of 0.2 M Ba(OH)2 solution is...

• 13.8

• 13.6

• 13.4

• 12.6

• 10.9

A solution with pH = 12 is made by dissolving a gram of NaOH (Mr = 40) in water until the volume of the solution is 500 mL. The value of a is...

• 4.0

• 2.0

• 1.0

• 0.4

• 0.2

If the acetic acid solution has a concentration of 0.1 M (Ka = 10-5), what is the pH of the acetic acid solution used to add sour taste to the meatball broth?

• 1

• 2

• 3

• 4

• 5

Sulfuric acid of 20 mL is titrated with sodium hydroxide solution of 0.1 M. If 30 mL of sodium hydroxide solution is required, what is the molarity of the sulfuric acid solution?

• 0.075 M

• 0.10 M

• 0.15 M

• 0.20 M

• 0.30 M