Determining the Concentration of Hydroxide Ions in a Barium Hydroxide Solution

Understanding the Solution and its ComponentsWhen discussing concentrations in solutions, it is essential to understand the relationship between the solute and the solvent. In the case of a barium hydroxide (Ba(OH)?) solution, the solute is barium hydroxide, which dissociates into ions when it dissolves in water.

Barium Hydroxide (Ba(OH)?) Dissociation

Barium hydroxide is a strong base that dissociates in aqueous solution:

( rm{Ba(OH)_2(s) rightarrow Ba^{2 }(aq) 2OH^-(aq)} )

From this equation, it is evident that one mole of Ba(OH)? dissociates into one mole of barium ions (Ba2?) and two moles of hydroxide ions (OH?).

Concentration Calculation

The problem at hand is to determine the concentration of hydroxide ions (OH?) in a 0.125 M Ba(OH)? solution. Given that one mole of Ba(OH)? dissociates into two moles of OH? ions, we can calculate the concentration of OH? ions as follows:

Step-by-Step Calculation

Identify the concentration of Ba(OH)? solution: 0.125 M Determine the moles of OH? ions per liter: Since 1 mole of Ba(OH)? produces 2 moles of OH?, then 0.125 moles of Ba(OH)? will produce 0.25 moles of OH?. Express the concentration of OH? ions: The concentration is 0.25 M (moles per liter).

Relevance to pH Calculation

Knowing the concentration of hydroxide ions (OH?) is crucial in determining the pH of the solution. The relationship between OH? concentration and pH can be described by the Henderson-Hasselbalch equation for bases:

( rm{pOH -log[OH^-]} )

Where [OH?] is the concentration of hydroxide ions. Given the concentration of OH? ions is 0.25 M, we can calculate the pOH:

( rm{pOH -log(0.25) approx 0.60} )

From this, the pH can be calculated using the relationship:

( rm{pH pOH 14} )

( rm{pH 14 - 0.60 13.40} )

Applications in Chemistry

The concentration of OH? ions is significant in various applications, including industrial processes, water treatment, and the study of pH in biological systems. Understanding these concentrations helps chemists and scientists to predict and control the behavior of solutions in different settings.

Relevance to SEO and SEO Best Practices

When optimizing this content for search engines like Google, including key phrases such as 'concentration of hydroxide ions' and 'Ba(OH)? solution' can improve the page's relevance and visibility in search results. Additionally, providing clear, step-by-step explanations and visual aids (like diagrams or tables) can enhance user engagement and help establish the page's authority.

Conclusion

By understanding the dissociation of barium hydroxide and the resulting concentration of hydroxide ions, we can accurately determine the pH of the solution. This knowledge not only benefits educational and scientific applications but also can improve web content's SEO, making it more accessible and user-friendly.