Hey, guys! Welcome to [Listening]!
Before today’s listening, let’s check the answers to the last episode.
- border clash;
If I told you that, you can use coke as a type of cleaner, would you believe that? And I ‘m gonna that you that I’m not kidding. Wanna know about the details? Do the listening and you’ll see!
Click the button at the bottom of the screen to play the audio. Please fill in the blanks and leave your answers in the comment. The answers will be revealed in the next episode.
Let’s get started!
Let’s begin with a cleaning tip: If you have some tarnished or corroded brass that you want to clean, an old brass ______(1 Word Missing) for example, you can use Coca-Cola, or any other cola soft drink, and that brass will come clean.
How Does This Work? And if Cola is such an effective cleaner of corroded metal , what is it doing to the inside of your stomach?
Cola cleans brass because it’s mildly ______(1 Word Missing).
Here’s what happens: When brass or another metal alloy becomes tarnished, this means that there has been a chemical reaction between the oxygen in the air and one of the metals in the alloy.
Oxygen atoms combine with metal atoms to form what’s called an oxide, and this oxide is what makes the metal appear tarnished. Acids, like the weak acid present in your can of Coke, can react with oxides to effectively reverse the process of tarnishing. The acid dissolves the metal oxides that make the tarnish, leaving only shiny metal behind.
You can try this at home, even if you don’t have a brass candlestick. Leave a tarnished old penny in a glass of cola overnight. In the morning it will be shiny and fresh.
If the acid in cola is so good at attacking tarnished metal, what might it do to your insides? Actually, your stomach already contains its own supply of acid which it uses to ______(1 Word Missing) food.
This stomach acid is a great deal stronger than the acid in a can of Coke. Indeed, stomach acid would be an even better tarnish remover than cola!
That’s all for [Listening] today!
Please leave your answers in the comments below! 😘
See you next time!