Young Thomas Edison Essays - Thomas Edison, Phonograph, Edison

Young Thomas Edison I read the book Young Thomas Edison , by Sterling North. The book tells about Edison's Young life and how he greatly succeeded through out the years. It tells about his greatest inventions and Edisons Historic sites and how her became the greatest inventor of all times. Thomas Alva Edison was born of February of 1847, in Milan Ohio. He was the seventh and last child of Nancy Edison and Samuel Edison. Thomas Alva Edison inherited much of his intelligence from Nancy Elliot Edison. Nancy Edison would read books to Thomas Edison about scientists. That's when Edison got interested in experiments. When Thomas Alva Edison was ten, he and his family moved to a small town in Purt, Hacon. There he had his own laboratory in the basement. At the age of eleven Edison and his friend would raise ten acces of vegetables. Then they would plant them and they would sell them around town. They wanted to earn money so they could give it to the family. They wanted to do this because they had financial problems. When Thomas Alva Edison was older he worked as a trainboy and would sell candies and newspapers. One day Thomas Edison's father realized that Edison was deaf from one ear. Thomas Edison became deaf from working on the locomotive. When Edison was working as a trainboy he got the idea of inventing a telegraph. When Edison was in his twenties he earned many patents by inventing the lightball, telegram, telegraph and many more inventions. Edison's second wife was Mrs. Mina Miller Edison. Edison had many chemical laboratories in his life. On 1931, Thomas Alva died when he collapsed. By this his inventions we have are street lights, phonographs and many other things. I would really recommend this book to any one because Thomas Alva Edison is one of the greatest inventors.

Acids and Bases - Calculating pH of a Strong Base

Acids and Bases - Calculating pH of a Strong Base KOH is an example of a strong base, which means it dissociates into its ions in aqueous solution. Although the pH of KOH or potassium hydroxide is extremely high (usually ranging from 10 to 13 in typical solutions), the exact value depends on the concentration of this strong base in water. So, its important to know how to perform the pH calculation. Strong Base pH Question What is the pH of a 0.05 M solution of Potassium Hydroxide? Solution Potassium Hydroxide or KOH, is a strong base and will dissociate completely in water to K and OH-. For every mole of KOH, there will be 1 mole of OH-, so the concentration of OH- will be the same as the concentration of KOH. Therefore, [OH-] 0.05 M. Since the concentration of OH- is known, the pOH value is more useful. pOH is calculated by the formula pOH - log [OH-] Enter the concentration found before pOH - log (0.05)pOH -(-1.3)pOH 1.3 The value for pH is needed and the relationship between pH and pOH is given by pH pOH 14 pH 14 - pOHpH 14 - 1.3pH 12.7 Answer The pH of a 0.05 M solution of Potassium Hydroxide is 12.7.