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When dissolved in water, an Arrhenius base yields*
Which compounds are electrolytes?*
Which compounds yield hydrogen ions as the only positive ions in an aqueous solution?*
Which substance is an electrolyte?*
Which compound yields H+ ions as the only positive ions in an aqueous solution?*
What can be explained by the Arrhenius theory?*
Which two compounds are electrolytes?*
Which type of substance yields hydrogen ions, H+, in an aqueous solution?*
The electrical conductivity of an aqueous solution depends on the concentration of which particles in the solution?*
Base your answers to questions 10 on the information below.
In a titration, a few drops of an indicator are added to a flask containing 35.0 milliliters of HNO3(aq) of unknown concentration. After 30.0 milliliters of 0.15 M NaOH(aq) solution is slowly added to the flask, the indicator changes color, showing the acid is neutralized.
The volume of the NaOH(aq) solution is expressed to what number of significant figures?*
Base your answers to questions 11 on the information below.
Ammonium chloride is dissolved in water to form a 0.10 M NH4Cl(aq) solution. This dissolving process is represented by the equation below.
Explain, in terms of ions, why a 10.0-milliliter sample of 0.30 M NH4Cl(aq) is a better conductor of electricity than a 10.0-milliliter sample of the 0.10 M NH4Cl(aq).*
Base your answers to questions 12 on the information below and on your knowledge of chemistry.
A laboratory technician is given the table below and a sample of one of the three substances listed in the table. The technician makes an aqueous solution with a portion of the sample. When a conductivity tester is lowered into the solution, the lightbulb on the tester glows brightly. Another portion of the sample is placed in a heat-resistant container that is placed in an oven at 450.°C. The sample melts.
Explain, in terms of ions, why an aqueous solution of potassium chromate conducts an electric current.*
Base your answers to questions 13 on the information below and on your knowledge of chemistry.
Natural gas and coal are two fuels burned to produce energy. Natural gas consists of approximately 80% methane, 10% ethane, 4% propane, 2% butane, and other components.
The burning of coal usually produces sulfur dioxide, SO2(g), and sulfur trioxide, SO3(g), which are major air pollutants. Both SO2(g) and SO3(g) react with water in the air to form acids.
Complete the equation below representing the reaction of sulfur trioxide with water to produce sulfuric acid, by writing the formula of the missing reactant and the formula of the missing product.
*
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.
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).*
