Preparation of Silver Tetraiodomercurate(II) for a demonstration.

Silver Tetraiodomercurate(II) is a quite special compound, since it’s thermochromic. It changes color from yellow to orange/red when heated: http://labphoto.tumblr.com/post/111304710632/yesterday-i-posted-about-fluorescence

Silver Tetraiodomercurate (Ag2HgI4) is yellow at room temperature, but when it’s heated above 50 °C, it turns orange. Since the color change is reversible, when it is cooled back to room temperature, the color changes back to its original color.

The compound was prepared from mercury(II)-iodide (that red powder on the first picture) and some potassium iodide with a little silver nitrate. The silver nitrate was added to the solution of potassium tetraiodomercurate (K2HgI4,   what was previously prepared from mercury-iodide and potassium iodide). The addition of the silver salt caused the immediate precipitation of the yellow colored silver tetraiodomercurate (as seen on the gif).

What happened? This:

HgI2 + 2 KI + 2 AgNO3 –> Ag2HgI4 + 2 KNO3


The Evolution of SHOOT (OTP): ACT THREE (1/-)

37. Shaw has been taken away from Root (just when Shaw reciprocated Root’s loving feelings).

38. Root is desperate to find out if Shaw is alive or dead. The pain of losing Shaw is intensely palpable.

39. Root finally sees Shaw (at a distance). Shaw IS alive. There is hope.

The continuation of ACT THREE: (what’s next  for SHOOT on “POI”)





No, Your Microwave Isn’t Dangerous - Food Myths #1

The first one is one we’ve heard a lot: microwaving your food zaps the nutritional value. Watch to find out why that’s a lot of malarkey.

By: ACS Reactions.

I want to follow more new people!! so reblog this if you:




Doctor Who

any nintendo games 


animated movies


AND/OR are in:


robotics (team 2867 woot)

( especially if you are in Indiana :P)

Or just think I should follow you for whatever reason! :)

anonymous asked:

What do you know about environmental analytical chem? Do you think it's a good field to get into? Thanks :-)

I don’t really know that much about it, other than that it involves doing very careful measurements of things in the environment (probably things that shouldn’t be in the environment). 

I would think that it’s a great field to get into if it’s what interests you! There’s a ton of shit in the environment that needs to be accurately measured and understood, and any work that benefits the environment is inherently a good thing. 

We need more people working on environmental issues and it you like it, I think you should do it. Go forth and very carefully measure things! 


How batteries work

Batteries are a triumph of science—they allow smartphones and other technologies to exist without anchoring us to an infernal tangle of power cables. Yet even the best batteries will diminish daily, slowly losing capacity until they finally die. Why does this happen, and how do our batteries even store so much charge in the first place? Adam Jacobson gives the basics on batteries.

View full lesson: http://ed.ted.com/lessons/why-batteries-die-adam-jacobson

Lesson by Adam Jacobson, animation by FOX Animation Domination High-Def.

By: TED-Ed.

e-Stent Provides Feedback, Therapy Before Dissolving

Every year, an estimated half-million Americans undergo surgery to have a stent prop open a coronary artery narrowed by plaque. But sometimes the mesh tubes get clogged. Scientists report in the journal ACS Nano a new kind of multi-tasking stent that could minimize the risks associated with the procedure. It can sense blood flow and temperature, store and transmit the information for analysis and can be absorbed by the body after it finishes its job.

Doctors have been implanting stents to unblock coronary arteries for 30 years. During that time, the devices have evolved from bare metal, mesh tubes to coated stents that can release drugs to prevent reclogging. But even these are associated with health risks.

Read more: http://www.laboratoryequipment.com/news/2015/05/e-stent-provides-feedback-therapy-dissolving


Pythagoras Cup (Greedy Cup) filled with Mercury

This features features Professor Sir Martyn Poliakoff from the University of Nottingham.

Numberphile for Pythagorean math: https://youtu.be/ItiFO5y36kw
Buy a Pythagorean Cup on Amazon: http://bit.ly/Pyth_Cup

By: Periodic Videos.