[Solved] observations of chemical changes 2 free essay

This experiment is meant to show how certain chemicals react with each other and can be identified by these reactions Procedure: Several different chemical mixtures were poured into the well plate and observed.

These included sodium bicarbonate and hydrochloric acid, brotherly blue and hydrochloric acid, ammonia and brotherly blue, hydrochloric acid and blue dye, blue dye and sodium hypochlorite, potassium iodide and lead titrate, sodium hydroxide and phenolphthalein, hydrochloric acid and phenolphthalein, sodium hydroxide and sliver nitrate, ammonia and silver nitrate, and ammonia and copper (II) sulfate. Some mixtures were also placed in the light or mixed with additional hydrochloric acid or dye. Observation TABLE: Questions: a. Silver nitrate could easily be used to test for sodium bicarbonate since it causes the chemical to turn brown. B. ) Winded- turns orange with BIT and De with phenolphthalein- base Dish soap- turns yellow with BIT and red with phenolphthalein- base Bleach- turns orange with BIT and purple with phenolphthalein- base Scrubbing Bubbles- turns blue with BIT and gray with phenolphthalein- acid c. ) The solution contains no vinegar or a very small amount of vinegar because a pink color indicates a basic solution, and vinegar is and acid. D. ) The yellow flavor is more acidic and the blue flavor is more basic. . ) Combining the mixture with potassium iodide could easily test for he presence of lead. If the mixture contained lead, then the potassium iodide would cause the mixture to turn yellow and thick like a solid. Conclusion: Many chemicals will produce obvious physical changes when mixed with other chemicals. These mixtures usually result in a change in color or consistency, which can distinguish them from other chemicals. While certain chemicals may react the same way with on mixture, testing a chemical with multiple mixtures will most likely allow the chemical to be identified.

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