WebIndicator for testing for water hardness: Hi , We need some assistance in preparing Eriochrome Black (Mordant Black) indicator for an EEI testing water hardness. We have in the past prepared this stain using 0.2g of the indicator powder in 15 mls of NH3 and then added 5 mls of ethanol. We found that the Eriochrome Black did not dissolve fully and are … WebMay 16, 2011 · Shuttle Endeavour is scheduled to liftoff on Monday at 8:56am Eastern time (5:56am Pacific). Currently, there is a 70 percent chance acceptable weather conditions a launch time, although there will be storms rolling through Kennedy Space Center over the weekend. The launch of STS-134 was delayed over 2 weeks because of technical issues.
Endeavour
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SOLUTION: Enzyme conversion and action - Studypool
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