Physics Chemical Effects of Current Part 7 (Liquids conducts electricity) Class 8 VIII | Summary and Q&A

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October 17, 2015
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Physics Chemical Effects of Current Part 7 (Liquids conducts electricity) Class 8 VIII

TL;DR

Some liquids, like tap water and lemon juice, are good conductors of electricity, while others, like distilled water and vinegar, are poor conductors.

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Key Insights

  • 🖤 Distilled water, lacking impurities, is a poor conductor.
  • 💦 Tap water's conductivity improves due to dissolved salts and minerals.
  • 💦 Adding salt to water or having acidic solutions enhances conductivity.
  • 🧂 Liquids' conductivity varies based on the presence of acids, bases, or salts.
  • 🫗 Some liquids conduct electricity poorly under certain circumstances.
  • 🧂 Pure conductivity requires the presence of acids, bases, or salts.
  • 🌟 LED lights require less current to glow, making them suitable for low-conductivity liquids.

Transcript

hello friends this video on chemical effects of current part 7 is brought to you by example.com no more fear from exam now we talk about the next thing that do liquids conduct electricity now so far we have been talking about good conductors and poor conductors of electricity so now we are focusing only on the liquids is it that all liquids are goo... Read More

Questions & Answers

Q: Why is distilled water a poor conductor of electricity?

Distilled water is a poor conductor because it lacks impurities like salts, acids, or bases, which are necessary for the flow of electric current.

Q: Why does tap water conduct electricity better?

Tap water contains dissolved salts and minerals, which act as conductors, allowing the flow of electric current and causing the bulb to glow.

Q: Why does the glow of the bulb increase when salt is added to tap water?

Adding salt to tap water increases its conductivity as the dissolved sodium chloride ions facilitate the flow of electric current, resulting in a brighter glow.

Q: Why is vinegar considered a poor conductor?

Vinegar conducts electricity, but its conductivity is relatively low, leading to a dim glow in the bulb. It contains acetic acid, which improves its conductivity.

Summary & Key Takeaways

  • Distilled water, which is pure with no impurities, is a poor conductor of electricity.

  • Tap water, containing minerals and impurities, is a better conductor of electricity compared to distilled water.

  • Adding salt to tap water or creating a solution of lemon juice increases its conductivity.

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