Happy Tuesday! This week’s question will focus on pesticides in groundwater. If you want to do a quick internet searching to prepare and review for questions related to this topic, feel free. Otherwise, read on!
For the past few years, news reporters have used words like “developing” and “emerging” and “crisis” to describe perfluorinated compounds. When you see adjectives like this, you can’t help but think “how did we not know about these PFC things before now?”
The truth is, these compounds have been produced for decades – some, for over half a century – and their chemical and physical properties are well-known. The strength of the carbon-fluorine bond in these compounds makes them heat-, water- and stain-resistant. Continue reading Extracting Perfluorinated Compounds from Drinking Water – Why is it so Challenging?
Just a reminder of last week’s post:
- Carving pumpkins is part of many modern Halloween traditions; however, carvings weren’t originally performed with pumpkins. Which vegetables were originally used for carving?
- Halloween parties have their origins with the American settlers who used to gather to celebrate the annual _______(fill in the blank)________
- The earliest costumes were worn to protect people against ____(fill in the blank)_____
- What is the most popular Halloween candy?
a. Hershey’s candy bars
c. Reese’s peanut butter cups
- Turnips and potatoes
- Evil Spirits
Share your early Halloween memories in the comments below and join us next week to Expand Your Horizon!
If you read one of my earlier posts on pesticide contamination in drinking water, you may have started to make a mental list of all the compounds you’ve heard or talked about in reference to their use in pesticides. If so, two of those compounds were likely paraquat and diquat.
These compounds are complex dipyridyls but with chemical names like 1,1′-dimethyl-4,4′- bipyridilium dichloride salt and 1,1′-ethylene-2,2′-bipyridilium dibromide salt, I assume you’re like me and refer to them as paraquat and diquat, respectively. Dipyridyls are effective herbicides which is why they are so commonly used to eradicate unruly weeds. Unfortunately, many herbicide products are non-selective and will kill a variety of plants, flowers and grasses along with those pesky weeds.
On the eve of Halloween, I find myself reminiscing about how I celebrated the holiday as a child. I remember the excitement of getting dressed up as my favorite animal or TV character, and bringing home a sack full of candy after a successful night of trick or treating. I also remember doing fun activities like making glow in the dark slime or ghost rockets.
If you’re like me, you’ve spent National Chemistry Week drinking from your coffee mug that’s shaped like a beaker, you’ve been cooking with the spices you store in test tubes, you’ve been wearing your t-shirts with periodic tables printed on them and you’ve been telling your best chemistry jokes.
Originally known as National Chemistry Day back in 1987, the American Chemical Society (ACS) created this even to bring awareness of the importance of chemistry in our day-to-day lives. The holiday has since been expanded to a full week and has been celebrated during the fourth week in October since 1989. To focus activities and celebrations for the holiday, the ACS assigns a theme each year. This year’s theme is “Chemistry is Out of This World!”
While National Chemistry Week runs from Oct 21-27, Mole Day is specifically celebrated on Oct 23 from 6:02 am to 6:02 pm. It’s a very specific window to celebrate the holiday, but there’s a reason. If you’re not sure what the reason is, write out the time and date using only numerical representation. Still scratching your head? Read on!
During National Chemistry Week, we’re continuing our trivia with an “Out of this World” focus.
Just a reminder of last week’s post:
An interesting study at the University of Georgia revealed the major component of interstellar clouds to be:
(a) Hydrogen and helium atoms
(c) My dreams
(e) Carbon Monoxide
A handful of researchers measured infrared emission from some interstellar clouds and found a measurable concentration of gas-phase naphthalene, which is the main compound in mothballs. Just to clarify, naphthalene is pretty flammable so modern day mothballs are primarily composed of 1,4-dichlorobenzene, but older mothballs contained lots of naphthalene.
It’s only the third day of National Chemistry Week so you have 4 more days to celebrate the fact that chemistry is out of this world!
Join us next week to Expand Your Horizon!