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Chemistry Facts

Why Does Cement Set?

Concrete has been known for literally thousands of years. It is a testament to the enduring strength of this material that concrete structures from those long-ago times are still standing strong ... Continue reading

Image of microstucture predicted from a NIST-developed model of cement hydration.

The Melting Point

Physical properties of a material fall into two categories: intrinsic properties determined by the structure of the particular molecule, and bulk properties characteristic of quantities of molecules ... Continue reading

Turning Oil Into Gas

When you see all those cars at the gas station filling up with unleaded, you may not stop to think about how that gasoline got there. It wasn't pumped out of the ground in that form. The same goes for ... Continue reading

What Is pH?

Anyone who is the least bit familiar with vinegar, nausea, sodium bicarbonate, and ammonia-based cleaning solutions probably has a very good 'feel' for the different natures of acidic and basic ... Continue reading

Litmus paper is used to measure pH.