General Chemistry Answers

Be sure to specify states such as (aq) or (s).

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Write a net ionic equation for the reaction that occurs when aqueous solutions of sodium hydroxide and hydrocyanic acid are combined.

Be sure to specify states such as (aq) or (s).

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Write a net ionic equation for the reaction that occurs when aqueous solutions of potassium hydroxide and hydrochloric acid are combined.

(Use H⁺ instead of H₃O⁺.)

What volume of a 0.169 M barium hydroxide solution is required to neutralize 15.2 mL of a 0.397 M hydrochloric acid solution?

_____________mL barium hydroxide

Use the References to access important values if needed for this question.

What volume of a 0.226 M hydrochloric acid solution is required to neutralize 11.8 mL of a 0.191 M sodium hydroxide solution?

_________ mL hydrochloric acid

What volume of a 0.126 M potassium hydroxide solution is required to neutralize 22.0 mL of a 0.139 M nitric acid solution?

___________mL potassium hydroxide

Calculate the number of milliliters of 0.611 M Ba(OH)₂ required to precipitate all of the Ca²⁺ ions in 101 mL of 0.762 M CaCl₂ solution as Ca(OH)₂. The equation for the reaction is:

CaCl₂(aq) + Ba(OH)₂(aq) Ca(OH)₂(s) + BaCl₂(aq)

 mL Ba(OH)₂

How many mL of 0.548 M HCl are needed to dissolve 5.89 g of CaCO₃?

2HCl(aq) + CaCO₃(s)  CaCl₂(aq) + H₂O(l) + CO₂(g)

The galvanizing of iron sheet can be carried electrolytically using a bath containing zinc sulfate solution. The sheet is made the cathode, and a graphite anode is used. Calculate the cost of electricity required to deposit 0.49 mm layer of zinc on both sides of an iron sheet 2.0 m wide and 80m long if the current is 30 A, the voltage is 3.5 V, and the energy efficiency of the process is 90%. Assume the cost of electricity is Php 12.50 per kilowatt-hr. The density of zinc is 7.1g/cm3.

Teflon is prepared by the polymerization of tetrafluoroethylene. Write the equation that

describes the polymerization using Lewis symbols.

What are the spectator ions in the following reaction?

MgCl₂ + 2AgNO₃ --> 2AgCl + Mg(NO₃)₂

_{A. Mg2+ and NO3-}

_{B. Mg2+ and Ag+}

_{C. Ag+ and Cl-}