Chemistry
Chemistry, 01.01.2020 21:31, ellenharley7

Is heat, gas production, and color change can all be evidence of chemical change

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Chemistry, 22.06.2019 22:30, skinniestoflegends
Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.
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Is heat, gas production, and color change can all be evidence of chemical change...

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