Identify The Substances That Are Likely To Dissociate In Water. Check All That Apply:- Sodium Bromide (NaBr)- Potassium Hydroxide (KOH)- Magnesium Chloride \left( MgCl_2 \right ]- Silicon Dioxide \left( SiO_2 \right ]- Sodium Oxide

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In chemistry, dissociation in water refers to the process by which a substance breaks down into its constituent ions when dissolved in water. This phenomenon is crucial in understanding various chemical reactions and properties of substances. In this article, we will identify the substances that are likely to dissociate in water.

What is Dissociation in Water?

Dissociation in water is a chemical process where a substance breaks down into its constituent ions when dissolved in water. This process is also known as ionization. When a substance dissociates in water, it releases its constituent ions into the solution, which can then participate in various chemical reactions.

Substances that Dissociate in Water

Several substances are known to dissociate in water. These substances include:

Sodium Bromide (NaBr)

Sodium bromide (NaBr) is a salt that dissociates in water to produce sodium ions (Na+) and bromide ions (Br-). This dissociation process is represented by the following equation:

NaBr (s) → Na+ (aq) + Br- (aq)

The sodium ions and bromide ions produced during this dissociation process can then participate in various chemical reactions.

Potassium Hydroxide (KOH)

Potassium hydroxide (KOH) is a strong base that dissociates in water to produce potassium ions (K+) and hydroxide ions (OH-). This dissociation process is represented by the following equation:

KOH (s) → K+ (aq) + OH- (aq)

The potassium ions and hydroxide ions produced during this dissociation process can then participate in various chemical reactions.

Magnesium Chloride (MgCl2)

Magnesium chloride (MgCl2) is a salt that dissociates in water to produce magnesium ions (Mg2+) and chloride ions (Cl-). This dissociation process is represented by the following equation:

MgCl2 (s) → Mg2+ (aq) + 2Cl- (aq)

The magnesium ions and chloride ions produced during this dissociation process can then participate in various chemical reactions.

Silicon Dioxide (SiO2)

Silicon dioxide (SiO2), also known as silica, is a compound that does not dissociate in water. Silicon dioxide is a covalent compound that is insoluble in water. It does not break down into its constituent ions when dissolved in water.

Sodium Oxide (Na2O)

Sodium oxide (Na2O) is a compound that dissociates in water to produce sodium ions (Na+) and oxide ions (O2-). This dissociation process is represented by the following equation:

Na2O (s) → 2Na+ (aq) + O2- (aq)

The sodium ions and oxide ions produced during this dissociation process can then participate in various chemical reactions.

Conclusion

In conclusion, several substances are known to dissociate in water, including sodium bromide (NaBr), potassium hydroxide (KOH), magnesium chloride (MgCl2), and sodium oxide (Na2O). These substances break down into their constituent ions when dissolved in water, which can then participate in various chemical reactions. On the other hand, silicon dioxide (SiO2) is a compound that does not dissociate in water.

Key Takeaways

  • Sodium bromide (NaBr) dissociates in water to produce sodium ions (Na+) and bromide ions (Br-).
  • Potassium hydroxide (KOH) dissociates in water to produce potassium ions (K+) and hydroxide ions (OH-).
  • Magnesium chloride (MgCl2) dissociates in water to produce magnesium ions (Mg2+) and chloride ions (Cl-).
  • Silicon dioxide (SiO2) does not dissociate in water.
  • Sodium oxide (Na2O) dissociates in water to produce sodium ions (Na+) and oxide ions (O2-).

References

  • Petrucci, R. H., Harwood, W. S., & Herring, F. G. (2002). General chemistry: principles and modern applications. Prentice Hall.
  • Atkins, P. W., & De Paula, J. (2006). Physical chemistry. Oxford University Press.
  • Chang, R. (2008). Chemistry. McGraw-Hill.

Frequently Asked Questions

Q: What is dissociation in water?

A: Dissociation in water is a chemical process where a substance breaks down into its constituent ions when dissolved in water.

Q: Which substances dissociate in water?

A: Several substances dissociate in water, including sodium bromide (NaBr), potassium hydroxide (KOH), magnesium chloride (MgCl2), and sodium oxide (Na2O).

Q: Why is dissociation in water important?

A: Dissociation in water is important because it allows substances to break down into their constituent ions, which can then participate in various chemical reactions.

Q: What is the difference between dissociation and ionization?

In our previous article, we discussed the concept of dissociation in water and identified several substances that dissociate in water. In this article, we will answer some frequently asked questions about dissociation in water.

Q: What is dissociation in water?

A: Dissociation in water is a chemical process where a substance breaks down into its constituent ions when dissolved in water. This process is also known as ionization.

Q: Which substances dissociate in water?

A: Several substances dissociate in water, including:

  • Sodium bromide (NaBr)
  • Potassium hydroxide (KOH)
  • Magnesium chloride (MgCl2)
  • Sodium oxide (Na2O)

Q: Why is dissociation in water important?

A: Dissociation in water is important because it allows substances to break down into their constituent ions, which can then participate in various chemical reactions. This process is crucial in understanding various chemical reactions and properties of substances.

Q: What is the difference between dissociation and ionization?

A: Dissociation and ionization are related but distinct concepts. Dissociation refers to the process by which a substance breaks down into its constituent ions when dissolved in water, while ionization refers to the process by which a substance breaks down into its constituent ions in the presence of energy.

Q: What is the role of water in dissociation?

A: Water plays a crucial role in dissociation. When a substance is dissolved in water, the water molecules interact with the substance and cause it to break down into its constituent ions.

Q: Can all substances dissociate in water?

A: No, not all substances can dissociate in water. Some substances, such as silicon dioxide (SiO2), do not dissociate in water.

Q: What are the factors that affect dissociation in water?

A: Several factors can affect dissociation in water, including:

  • Temperature: Increasing the temperature can increase the rate of dissociation.
  • Concentration: Increasing the concentration of the substance can increase the rate of dissociation.
  • pH: The pH of the solution can affect the rate of dissociation.

Q: How can we measure dissociation in water?

A: Dissociation in water can be measured using various techniques, including:

  • Titration: This involves adding a known amount of a substance to a solution and measuring the amount of substance that dissociates.
  • Spectrophotometry: This involves measuring the amount of light absorbed by a solution and using this information to calculate the amount of substance that dissociates.

Q: What are the applications of dissociation in water?

A: Dissociation in water has several applications, including:

  • Water treatment: Dissociation in water is used to remove impurities from water.
  • Chemical synthesis: Dissociation in water is used to synthesize new compounds.
  • Environmental monitoring: Dissociation in water is used to monitor the amount of pollutants in water.

Conclusion

In conclusion, dissociation in water is an important chemical process that allows substances to break down into their constituent ions. Understanding dissociation in water is crucial in various fields, including chemistry, environmental science, and water treatment. We hope that this article has provided you with a better understanding of dissociation in water and its applications.

Key Takeaways

  • Dissociation in water is a chemical process where a substance breaks down into its constituent ions when dissolved in water.
  • Several substances dissociate in water, including sodium bromide (NaBr), potassium hydroxide (KOH), magnesium chloride (MgCl2), and sodium oxide (Na2O).
  • Dissociation in water is important because it allows substances to break down into their constituent ions, which can then participate in various chemical reactions.
  • Water plays a crucial role in dissociation, and several factors can affect dissociation in water, including temperature, concentration, and pH.
  • Dissociation in water can be measured using various techniques, including titration and spectrophotometry.
  • Dissociation in water has several applications, including water treatment, chemical synthesis, and environmental monitoring.