Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
What is brine? |
Saltwater solution - sodium chloride dissolved in water |
|
Which electrode is positively charged? |
Anode |
|
Which electrode is negatively charged? |
Cathode |
|
When an electric current is run through sodium chloride solution, what happens to the negatively charged chloride ions? |
They are attracted to the positive anode and an electron is ripped off, and the atoms bond to form Cl2 gas |
|
What happens to the positively charged sodium ions? |
They are attracted to the negative anode and the electron that is ripped off the chloride ion travels along the electric current between the electrodes and is gained by the sodium ions to become atoms. |
|
Why is water slightly ionising? |
Some H2O molecules are ripped apart to create positive H ions and some negative OH (hydroxide) ions, but a balance of the two makes it still neutral in acidity and charge. |
|
What happens to the positively charged hydrogen ions when they get to the cathode? |
They are released as H2 hydrogen gas |
|
What happens to the hydroxide ions when they interact with the sodium atoms? |
They react and form sodium hydroxide solution
|
|
What happens to the chlorine atoms? |
They are given off as Cl2 gas |
|
What is sodium hydroxide useful for? |
- Dissolving matter that is blocking drains - Making soap - Used in bleach |
|
What is hydrogen (gas) useful for? |
- Hydrogenating oils to make solid spread - Rocket fuel and possibly car fuel |
|
What is chlorine useful for? |
- Disinfecting swimming pool water - Disinfecting drinking water - Used as a bleaching agent |