African-American History and Women Timeline 1990-1999

African-American History and Women Timeline 1990-1999 More of the  Timeline:  1980 - 1989  /  2000 - 1990 Sharon Pratt Kelly elected mayor of Washington, DC, the first African-American mayor of a major American city Roselyn Payne Epps became the first woman president of the American Medical Association Debbye Turner became third African American Miss America Sarah Vaughan died (singer) 1991 Clarence Thomas nominated for a seat on the US Supreme Court; Anita Hill, who had worked for Thomas in the federal government, testified about repeated sexual harassment, bringing the issue of sexual harassment to public attention (Thomas was confirmed as Justice) Marjorie Vincent became fourth African American Miss America 1992 (August 3) Jackie Joyner-Kersee became the first woman to win two Olympic heptathlons (September 12) Mae Jemison, astronaut, became the first African-American woman in space (November 3) Carol Moseley Braun elected to the US Senate, the first African-American woman to hold that office   (November 17)  Ã‚  Audre Lorde  died (poet, essayist, educator)   Rita Dove named the US Poet Laureate. 1993 Rita Dove became the first African American poet laureate   Toni Morrison  became the first  African-American  winner of the  Nobel Prize for Literature. (September 7) Joycelyn Elders became the first African American and first woman US Surgeon General (April 8) Marian Anderson died (singer) 1994 Kimberly Aiken became fifth African American Miss America 1995 (June 12) Supreme Court, in Adarand v. Pena, called for strict scrutiny before establishing any federal affirmative action requirements Ruth J. Simmons installed as president of Smith College in 1995. becoming the first African-American president of one of the Seven Sisters 1996 1997 (June 23) Betty Shabazz, widow of Malcolm X, died of burns sustained in a June 1 fire in her home 1998 DNA evidence was used to test the theory that Thomas Jefferson fathered the children of a woman he enslaved, Sally Hemings most concluded that the DNA and other evidence confirmed the theory (September 21) track and field great Florence Griffith-Joyner died (athlete; first African-American to win four medals in one Olympics; sister-in-law of Jackie Joyner-Kersee) (September 26) Betty Carter died (jazz singer) 1999 (November 4) Daisy Bates died (civil rights activist) More of the Timeline:  1980 - 1989 / 2000 -

Turn Baking Soda Into Washing Soda

Turn Baking Soda Into Washing Soda These are easy instructions for making sodium carbonate, also known as washing soda or soda ash, from baking soda or sodium bicarbonate. Make Sodium Carbonate Sodium bicarbonate is CHNaO3, while sodium carbonate is Na2CO3. Simply heat baking soda or sodium bicarbonate in a 200 F oven for about an hour. Carbon dioxide and water will be given off, leaving dry sodium carbonate. This is the soda ash. The chemical reaction for the process is: 2 NaHCO3(s) → Na2CO3(s) CO2(g) H2O(g) The compound will readily absorb water, forming the hydrate (returning to baking soda). You can store the dry sodium carbonate in a sealed container or with a desiccant to keep it dry or allow it to form the hydrate, as desired. While sodium carbonate is fairly stable, it slowly decomposes in dry air to form sodium oxide and carbon dioxide. The decomposition reaction can be accelerated by heating the washing soda to  851 C (1124 K). Key Takeaways: Baking and Washing Soda Sodium bicarbonate (baking soda) and sodium carbonate (washing soda) are similar molecules. The difference is  how much water is incorporated into the molecule.If you bake baking soda, it decomposes to form washing soda, releasing carbon dioxide and water.Over time, washing soda decomposes for form sodium oxide, releasing carbon dioxide. Warmer conditions speed the decomposition process. Uses for Washing Soda Washing soda is a good all-purpose cleaner. Its high alkalinity helps it cut grease, soften water, and disinfect surfaces. Keep in mind, sodium carbonate solution irritates the skin and can produce chemical burns in pure form. Wear gloves when using it! Sodium carbonate is used to adjust swimming pool pH, prevent caking in foods, and as a treatment for ringworm and eczema. Its also used on a commercial scale for making glass and paper products.