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Which compound is an Arrhenius base?*
Which formula can represent hydrogen ions in an aqueous solution?*
Which substance is an Arrhenius base?*
Which substance is an Arrhenius acid?*
The concentration of which ion is increased when LiOH is dissolved in water?*
Which pair of compounds represents one Arrhenius acid and one Arrhenius base?*
Which type of substance yields hydrogen ions, H+, in an aqueous solution?*
Based on the Arrhenius theory, when potassium hydroxide dissolves in water, the only negative ion in the aqueous solution is*
Base your answers to questions 11 on the information below and on your knowledge of chemistry.
A NaOH(aq) solution with a pH value of 13 is used to determine the molarity of a HCl(aq) solution. A 10.0-mL sample of the HCl(aq) is exactly neutralized by 16.0 mL of 0.100 M NaOH(aq). During this laboratory activity, appropriate safety equipment was used and safety procedures were followed.
Compare the hydronium ion concentration to the hydroxide ion concentration when the HCl(aq) solution is exactly neutralized by the NaOH(aq) solution.*
Base your answers to questions 12 on the information below and on your knowledge of chemistry.
In a laboratory activity, a student titrates a 20.0-milliliter sample of HCl(aq) using 0.025 M NaOH(aq). In one of the titration trials, 17.6 milliliters of the base solution exactly neutralizes the acid sample.
Identify the positive ion in the sample of HCl(aq).*
Base your answers to questions 13 on the information below and on your knowledge of chemistry.
A student is to determine the concentration of an NaOH(aq) solution by performing two different titrations. In a first titration, the student titrates 25.0 mL of 0.100 M H2SO4(aq) with NaOH(aq) of unknown concentration.
In a second titration, the student titrates 25.0 mL of 0.100 M HCl(aq) with a sample of the NaOH(aq). During this second titration, the volume of the NaOH(aq) added and the corresponding pH value of the reaction mixture is measured. The graph below represents the relationship between pH and the volume of the NaOH(aq) added for this second titration.
Identify the positive ion present in the H2SO4(aq) solution before the titration.*
Base your answers to questions 14 on the information below and on your knowledge of chemistry.
During a titration, 10.00 mL of acetic acid, HC2H3O2(aq), is completely neutralized by adding 12.50 mL of 0.64 M sodium hydroxide, NaOH(aq).
Identify the only positive ion in the HC2H3O2(aq).*
Base your answers to questions 15 on the information below and on your knowledge of chemistry.
A sample of nitric acid contains both H3O+ ions and NO3− ions. This sample has a pH value of 1. 15 Write a name of the positive ion present in this sample.*
Write a name of the positive ion present in this sample.*