Allergic Reactions Search Results

How To: Work with reaction mechanisms in organic chemistry

In this free video science lesson from Internet pedagogical superstar Salman Khan, you'll learn how to handle reaction mechanisms in organic chemistry. Whether you need help studying for that next big test or could just use a hand finishing your homework, you're sure to be well served by this video lesson. For more information, including detailed, step-by-step instructions, take a look.

How To: Use Markovnikov's rule to determine the likelihood of an addition reaction

In this free video science lesson from Internet pedagogical superstar Salman Khan, you'll learn how to use Markovnikov's rule to figure out which addition reaction is most likely in organic chemistry. Whether you need help studying for that next big test or could just use a hand finishing your homework, you're sure to be well served by this video lesson. For more information, including detailed, step-by-step instructions, take a look.

News: Facebook Reactions Are Live & Now You Can Die Happy

Have you ever run across a Facebook post that you don't necessarily want to "Like," but you're not really passionate enough about to bother stringing together a couple words for a comment? Well, you're in luck, as Facebook added five new "Reactions" that let you do more than just like a post, and they're now live for everyone.

How To: Identify and control problems with bermudagrass

In this how-to video, you will learn how to identify and control problems with Bermuda Grass. If you are worried with allergies, you should check if you are allergic to this particular grass. The seed heads produce the majority of it, but even the pollen produces these allergies. Regarding the water schedule, the grass needs water during the summer. If you have a fine textured soil, you should water about one time a week. If your grass is turning a blue-gray color, it might be lacking water. ...

How To: Understand how metals react in hydrochloric acid

In this video tutorial the instructor talks about Hydrochloric acid (HCL) and how it reacts to a few metals. To try this out take 30 ml of concentrated hydrochloric acid in a beaker. You need to employ caution while handling acids, especially if you use strong ones. Now you can throw small pieces of different metals into it carefully to see how it reacts with different metals. For instance when this HCL comes in contact with metals various reaction take place depending up on the metal. Like i...

How To: identify problems with the cotton wood and aster tree

In this Home & Garden video tutorial you will learn how to identify problems with the cotton wood and aster tree. Curtis Smith, extension horticulturist, presents this video along with Judy Nickell, master gardener. Female Junipers make berries and male Junipers make pollens. Lot of people are allergic to the pollens. So, you will be better advised to avoid male junipers in your landscapes. On the other hand berries of female junipers attract birds and are good for increasing bird activity. F...

How To: Make one spoonful of cookie dough

In this tutorial, we learn how to make one spoonful of cookie dough. First, clear off an area to work. You will need: butter, brown sugar, sugar, vanilla, flour, and water to this. First, place 1 spoonful of all the items into a mixing bowl and mix together until the dough reaches a nice consistency. This won't make you allergic since there are no eggs in it. You can add chocolate chips to this mixture if you want something different. Store the rest in the freezer if you aren't going to eat i...

How To: Find and treat insect bites on your pets

When caring for your pet, finding and treating their insect bites which may cause allergic reaction in your pets. Bites from wasps, spider, bees, and other insects may cause an intense allergic effect. First, check if your pet is still breathing and check if there is a stinger still is in their body and scrape it out using a credit card. Using a medication that contains only chlorpheniramine if your pet is conscious, breathing, and not vomiting. Using this method, you will be able to ensure t...

How To: Make TCPO (for making glow sticks)

How to make TCPO or bis(2,4,6-trichlorophenyl) oxalate, used in glow stick reactions. WARNING: This procedure should only be performed by, or under the direct supervision of, an experienced chemist. Please refer to the material safety data sheets of all chemicals for their hazards. Synthesis must be performed in a fumehood.

How To: Make hydrochloric acid from salt

In this tutorial, we learn how to make hydrochloric acid from salt. First, you will pour some salt into a distil flask. After this, you will add in some concentrated sulfuric acid to the salt. Next, you will let these react with each other. You will start to see gasses bubble up and the excess hydrogen chloride gas come out through the top of the tube. To create a stronger reaction, you can add heat underneath the reaction. Then, test this by exposing it to ammonium chloride. If it's the righ...

How To: Use Any Emoji as a Message Reaction in WhatsApp for iOS, Android, Desktop, and Web

Instead of responding to a WhatsApp message with short texts like "LOL" or thinking too hard about something meaningful to say, use an emoji reaction. They cut down on clutter in group chats and take up less space than typing emoji individually in a conversation. WhatsApp initially limited reactions to just six emoji, but a new update lets you use any emoji you want.

News: You're Not Crazy, Your iPhone Is Making Strange Noises

Apple hasn't really changed notification sounds on the iPhone since iOS 7. So how come you hear strange pings, plunks, and doots coming from your iOS device? No, it's not an app you downloaded (although third-party apps can have their own notification sounds). Instead, what you're experiencing is likely the result of updating your iPhone to iOS 13.

How To: Take an acid and base to make salt

In this tutorial we learn how to take an acid and base to make salt. To start, you will first need to take an acid of your choice, this can be something like vinegar. After this, you will combine the acid with a base and then wait for it to react. Once it starts to react, gases will release from them and you will end up with some salt! Be sure to put a cap on the container while the reaction is happening. This will allow the reactions to come together and the gases to react. Have fun and do t...

How To: Balance an easy chemical equation

In this video, we learn how to balance an easy chemical equation. You can do your equation by testing it out with the actual chemicals. Watch and see what the reaction is as they start to mix together. To balance this reaction out, you will need to analyze the number of atoms that each element has on both sides of the equation. For it to be balanced, you must have the same number of products and reactants in the equation. You cannot create or destroy matter, you can only change its form, so r...

How To: Synthesize copper(II) carbonate & sodium bicarbonate

This actions is a video tutorial in the Education category where you are going to learn how to synthesize copper(II) carbonate & sodium bicarbonate. For this you will need copper sulphate which is available in root kill and sodium bicarb which is baking soda. Take 100g of copper sulphate and dissolve in about 400ml of water. Now take 69.27g of baking soda. Add baking soda very slowly and keep stirring the solution. You got to be very careful as the chemical reaction will produce lot of carbon...

How To: Test paint for the presence toxic lead

In this tutorial, we learn how to test paint for the presence toxic lead. You will first need to make up two solutions. One will need sodium sulfide and water mixed together in a small container. Then, add acidic acid and water into another container. Drop small amounts of the mixtures into containers, then add in the paint to the containers. Watch and see how the reaction of the paint is with the mixture. If you start to see a black reaction occur in the container, you will know that your pa...