Copper aspirinate Copper aspirinate Copper(II) aspirinate is an aspirin chelate of copper(II) cations (Cu). It is used to treat rheumatoid arthritis. Copper aspirinate can be prepared by several methods. In one route of preparation, an excess of acetylsalicylic acid is dissolved in aqueous sodium carbonate. Sodium hydroxide is not suitable for this purpose, because it will hydrolyse acetylsalicylic acid ("ASA") into salicylic acid and sodium acetate. The resulting solution is then filtered to remove any undissolved acetylsalicylic acid and is mixed with a solution containing Cu cations (copper(II) sulfate is suitable), precipitating bright blue crystals of copper aspirinate immediately. The crystals can
The Indian in the Cupboard the French, and Boone wishes that he could somehow supply his friend with the "modern" six-shooters that are common in Boone's late 19th century timeline. Patrick gets the idea to take plastic soldiers (with 20th century weaponry) back through the cupboard to Little Bear's time. Little Bear likes the idea of modern weapons, but refuses to bring English soldiers back to his village. Omri is reluctant, believing this amounts to meddling with history, but is won over by his desire to save Little Bear's people. The boys buy several more plastic Iroquois figures from the local shops and bring them