Profiles: George Washington Carver

George Washington Carver was born in Diamond, MO, in 1864/5, though the real date is unknown. Born into slavery, Carver’s parents Giles and Mary were owned by a German immigrant slaveholder Moses Carver. At the conclusion of the civil war, Moses Carver and his wife Susan decided to keep George and his brother James. Susan […]

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Calculating the pH of a Buffer System

The point of this problem is to correctly calculate the pH of a buffer system using formonitrile, or hydrogen cyanide. Here, we use the dissociation constant and the Henderson-Hasselbach equation. Given Problem: Calculate the pH of a buffer that’s .250 M HCN (kª= 4.9*10^-10) and 0.170 M KCN.  2. This is to remind us of the […]

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Profile: Samuel Massie Jr.

Dr. Samuel Massie Jr.:  Samuel Massie Jr. was born in Little Rock, Arkansas on July 3rd, 1919. The son of two teachers, Massie was an incredibly bright child. He skipped many grades and ended up graduating from high school at the age of 13. Too young to be accepted to college, Massie and worked at the […]

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Profiles Special Edition!: Celebrating Black History Month

Happy black history month everyone! It’s important for us to celebrate black culture this month and reflect on what we can do to be helpful allies to the black community. Here at heychem, we love our chemists of color, and always want to give them the shoutout that they deserve! Often facing racial, economic, and […]

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Titration of Strong Acid With Strong Base

The goal of this example is to help students become fluent in calculating pH/pOH of a solution during a titration of a strong acid (HCl) and a strong base (NaOH). This problem includes calculations for titrations of increasing volumes. Given Problem: Calculate the pH of a titration of 25.0 mL of HCl (.100 M) with […]

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