Eating and/or drinking inside the laboratory should be avoided. If the hands become contaminated with any poisonous material in the course of the experiment that material might eventually find its way to the mouth causing inadvertent poisoning.
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Q: Identify basic procedures for dealing with laboratory accidents.
A: Given: Basic procedures for dealing with laboratory accidents.
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- You and a partner are asked to complete a lab entitled“Oxides of Ruthenium” that is scheduled to extend over twolab periods. The first lab, which is to be completed by yourpartner, is devoted to carrying out compositional analysis.In the second lab, you are to determine melting points. Upongoing to lab you find two unlabeled vials, one containinga soft yellow substance and the other a black powder. Youalso find the following notes in your partner’s notebook—Compound 1: 76.0% Ru and 24.0% O (by mass), Compound2: 61.2% Ru and 38.8% O (by mass). (a) What is the empiricalformula for Compound 1? (b) What is the empiricalformula for Compound 2? Upon determining the meltingpoints of these two compounds, you find that the yellowcompound melts at 25 °C, while the black powder does notmelt up to the maximum temperature of your apparatus,1200 °C. (c) What is the identity of the yellow compound?(d) What is the identity of the black compound? (e) Whichcompound is molecular? (f) Which compound is…Chemical reagents in the laboratory can be classified into various grades. Nameand explain the use of four major chemical grades available.What is the dominant iron species in water samples ? What environmental factors may have contributed. why is it necesseyy to to investigate Fe3+ concentration and total Fe concentration dpeedtaely ? Why do we need to do the sample to determine total Fe concentration ? And how did then determine Fe2+ concentration?
- 1. What are the important considerations in determining the % ash content and elemental contents of plants under investigation? 2. Suggest other methods of analysis of commercial herbal drugs. Enumerate and discuss each.1. "Band structure" of "Hatom chain" and "H mole chain" are drawn as "graphs" and "intermediate process". Describe it in detail.A(n) ___________ property describes the behavior of asubstance when it reacts or combines with anothersubstance.
- What constitutes a 'reference material', and why does its utilization play a criticalrole in the chemical analysis of food products? Provide examples.How would you set up and solve this problem?What safety precautions are neccessary with the disposal of selenium selenite and when handeling? Preparing to make a selenium solution with water.