You have a bottle of solid barium hydroxide and some dilute...

You have a bottle of solid barium hydroxide and some dilute sulfuric acid. You place some of the barium hydroxide in water and slowly add sulfuric acid to the mixture. While adding the sulfuric acid, you measure the conductivity of the mixture. (a) Write the complete, balanced equation for the reaction occurring when barium hydroxide and sulfuric acid are mixed. (b) Write the net ionic equation for the barium hydroxide and sulfuric acid reaction. (c) Which diagram represents the change in conductivity as the acid is added to the aqueous barium hydroxide? Explain briefly.

You have a bottle of solid barium hydroxide and some dilute sulfuric acid. You place some of the barium hydroxide in water and slowly add sulfuric acid to the mixture. While adding the sulfuric acid, you measure the conductivity of the mixture.
(a) Write the complete, balanced equation for the reaction occurring when barium hydroxide and sulfuric acid are mixed.
(b) Write the net ionic equation for the barium hydroxide and sulfuric acid reaction.
(c) Which diagram represents the change in conductivity as the acid is added to the aqueous barium hydroxide? Explain briefly.

Key Concepts

Titration Curves and Equivalence Points

Titration curves graphically represent how a measurable property of the reaction mixture, such as pH or conductivity, changes as a titrant is added to the analyte. The equivalence point, where the amount of titrant exactly neutralizes the analyte, is a critical feature of these curves. In conductivity measurements, the trend can reveal changes in ion concentrations before, at, and after the equivalence point, helping to understand the complete reaction process.

Conductivity in Electrolyte Solutions

Conductivity is a measure of a solution's ability to conduct electricity, which depends on the concentration, charge, and mobility of its ions. In reactions involving acids and bases, changes in conductivity can indicate the relative amounts of ions present in the solution at different stages of the reaction, thus providing insights into the progress of the reaction.

Net Ionic Equations

A net ionic equation isolates the actual chemical change by removing the spectator ions that do not participate in the reaction. This simplification allows one to focus on the species that undergo a chemical transformation, providing a clearer understanding of the core process occurring in the solution, especially in reactions involving strong acids and bases.

Precipitation Reactions

Precipitation reactions occur when two soluble salts react in solution to form an insoluble compound, known as a precipitate. Recognizing these reactions is important because the formation of a precipitate can remove ions from the solution, which in turn affects other properties of the solution, such as conductivity.

Acid-Base Neutralization

This concept involves the reaction between acids and bases resulting in the formation of water and a salt. In many acid-base reactions, the process is exothermic and involves neutralization of the hydroxide ions by hydrogen ions. Writing a balanced equation for such reactions ensures the law of conservation of mass is obeyed, and it forms the basis for further analysis like determining the equivalence point during titration.

Transcript

0:00 Hello everyone.

00:01 Let us see the following question.

00:03 You have a bottle of solid barium hydroxide and some dilute sulfuric acid.

00:08 You place some of the barium hydroxide in water and slowly add some sulfuric acid to the mixture.

00:14 While adding the sulfuric acid, you will measure the conductivity of the mixture.

00:19 So, basically we have barium hydroxide solution.

00:23 So to this barium hydroxide, basically it is a base which is capable of ionizing.

00:30 Into barium ion, b .a .2 plus ion and o .h.

00:35 Minus ion.

00:36 So, to this solution, we slowly add sulfuric acid, that is h2, so4, which also decomposes as 2 h plus ions and sulfate.

00:46 So4, 2 ions.

00:47 So, as the amount of sulfuric acid slowly increases, it starts a neutralizing.

00:54 Neutralization as the neutralization begins the amount of ions in the beaker slowly decreases and hence the conductivity also slowly decreases now based on that we have following questions to be answered question a write the complete balanced equation for the reaction between barium hydroxide b a o h twice, okay, with the sulfuric acid, h2, so4.

01:23 This is a neutralization reaction giving barium sulfate, which is a solid plus two units of water.

01:31 So, hence we have aqueous base and acquiesce acid gives solid precipitate and liquid water.

01:40 This is a neutralization reaction...

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