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acidsandbases

QuestionAnswer
what does not describe acids and bases? acids have an endothermic reaction
as an aqueous solution increases from 5 to 9 what happens? concentration of H ions DECREASES and OH ions INCREASE
which of the following is the role of NH3 in this equilibrium? bronsted-lowery base
which of the following statements describing the relationship between the hydrogen ion and the hydroxide ion is always correct? Whenever the concentration of H ions increases the concentration of OH ions decreases.
Which of the following compounds is amphoteric when dissolved in water? NaHCO3
Which statement accurately describes 1 of the conjugate acid-base pairs in this equilibrium? NO3 is the conjugate base of HNO3.
Which of the following statements best decribes the role of water when HCl dissolves in water? When HCl dissolves in H2O, the H2O: accepts a hydrogen ion from HCl
Which of the following statements always accurately describes acids and bases? weak acids and weak bases partially ionize in water
which of the following is a strong acid? HBr
Which of the following bases is a weak base? NH4OH
If a student adds 2.00 g of NaOH to 250 mL of pure water, which value is closest to the resulting pOH of the water? 0.7
What is the balanced chemical equation for the reaction of solid aluminum hydroxide with aqueous hydrochloric acid? Al(OH)2 + 3 HCl  AlCl3 + 3 H2O
At 25 degrees Celsius, an aqueous solution of LiOH has a molarity of 0.25 M. What is the pH of this solution? 12.40
Chemists use sulfuric acid to neutralize potassium hydroxide. What is the balanced chemical equation for this reaction? 2KOH + H2SO4  K2SO4 + 2H2O
Which substance has a H ion concentration greater than 1.0 X 10^-4 M? lemon juice
Ingrid uses the acid-base indicator bromothymol blue in a titration of approximately 0.1 M KOH with 0.05 M HCl. Bromothymol blue is yellow in acidic solutions and blue in basic solutions. What colors does Ingrid observe and when? Blue at the start of the titration, green at the equivalence point , and yellow after adding the excess of HCl.
Carbonic acid (H2CO3) has an acid dissociation constant (Ka) of 4.4 X 10^-7 for its first ionizable hydrogen, and nitrous acid (HNO2) has a Ka value of 7.2 X 10^-4. Which statement accurately compares the two acids? H2CO3 is weaker acid than HNO2 because H2CO3 has a smaller Ka value.
A scientist must carry out a reaction in water. This reaction is very sensitive to small changes in pH. What can she add to the water to prevent pH changes during the reaction. buffer only
Created by: lovewarmth10
 

 



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