acidsandbases
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| what does not describe acids and bases? | acids have an endothermic reaction
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| as an aqueous solution increases from 5 to 9 what happens? | concentration of H ions DECREASES and OH ions INCREASE
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| which of the following is the role of NH3 in this equilibrium? | bronsted-lowery base
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| 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.
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| Which of the following compounds is amphoteric when dissolved in water? | NaHCO3
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| Which statement accurately describes 1 of the conjugate acid-base pairs in this equilibrium? | NO3 is the conjugate base of HNO3.
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| 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
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| Which of the following statements always accurately describes acids and bases? | weak acids and weak bases partially ionize in water
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| which of the following is a strong acid? | HBr
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| Which of the following bases is a weak base? | NH4OH
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| 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
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| 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
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| 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
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| Chemists use sulfuric acid to neutralize potassium hydroxide. What is the balanced chemical equation for this reaction? | 2KOH + H2SO4 K2SO4 + 2H2O
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| Which substance has a H ion concentration greater than 1.0 X 10^-4 M? | lemon juice
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| 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.
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| 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.
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| 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
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