Haz Chem 3.1 - Aqua Regia

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Quiz for module Haz Chem 3.1 - Aqua Regia (HC_3.1_v2)

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Module Document Declaration

This module is based on the following documents which you must have read, and declared as read, and the following videos which you must declare as viewed:

SCI-CHEMSCI-SWP-6725 - Safe handling of Aqua Regia

PLEASE NOTE:
-> The declaration statement has no bearing on your quiz score.
-> If you have declared the documents as read during a previous quiz attempt, you do not need to declare them as read again.
-> If you have passed the quiz previously but not declared the documents as read, you may declare them as read at any time but you do not need to pass the quiz again.

I declare...

… that I have read the following required documents, and viewed the following required videos (if applicable) for this module and will comply with the instructions and procedures contained within them. (Select all that apply)

SCI-CHEMSCI-SWP-6725

Module Quiz

True or False: Aqua regia is primarily used to to dissolve gold and titanium. *

True

False

Required

Select the correct minimum PPE for working with aqua regia solution *

Enclosed fabric footwear, safety glasses, lab coat, chemically resistant gloves (butyl or vitron/butyl) over nitrile gloves

Enclosed leather footwear, safety glasses, lab coat, chemically resistant gloves (butyl or vitron/butyl) and a full face shield if preparing large volumes.

Enclosed leather footwear, safety glasses, flame retardant lab coat, chemically resistant gloves (butyl or vitron/butyl) over nitrile gloves

Enclosed leather footwear, safety glasses, flame retardant lab coat, chemically resistant gloves (butyl or vitron/butyl) over nitrile gloves, face shield

Enclosed leather footwear, safety glasses, flame retardant lab coat, chemically resistant gloves (neoprene/nitrile) face shield

Enclosed leather footwear, safety glasses, lab coat, chemically resistant gloves (neoprene/nitrile) face shield

Enclosed leather footwear, safety glasses, lab coat, chemically resistant gloves (neoprene/nitrile) face shield if preparing large volumes.

Listed below are a few statements about aqua regia solution, all but one are true. Select the false statement. *

Preparation of aqua regia solution is exothermic and may result in burns if not handled with extreme caution

Do not use Aqua Regia on glassware that may be contaminated with significant amounts of organic material – it could lead to an explosion

Do not store a hot aqua regia solution in an air tight container it will explode use a vented cap

Aqua regia is extremely corrosive and can result in skin burns if not handled carefully. The solution also generates Cl2 and NOx, which are toxic and may be explosive if large amounts of organic compounds are present.

Don’t mix piranha and aqua regia waste

True or False: new waste containers should be filled 3/4 with water prior to the first disposal of aqua regia. *

True

False

When making up aqua regia solution you should: *

Make enough for everyone in your group

Make the minimum volume needed

Make in bulk and store for later

You should always make up 100 ml of solution as the maths is easier to calculate

The SOC SWP for both piranha and Aqua regia solution both state you should never make more than 50 ml of these solutions at a time.

True or False Always add hydrochloric acid to the nitric acid slowly *

True

False

Which of these is the first step of this sequence in preparing/using aqua regia *

Perform the first rinse of the glassware with miliQ wate inside the fume cupboard by filling the glassware with miliQ water and pouring it into the aqua regia waste container.

After termination of the reaction, pour the aqua regia solution into a plastic waste container (properly labelled and filled half full with water prior to the first addition of aqua regia waste). Allow aqua regia to cool down then SLOWLY pour into the waste container. Use the blue-vented cap to avoid pressure build up.

Pour the aqua regia solution from the pyrex jar to the glassware and soak for a maximum of 1 hour, while being kept in a bigger pyrex dish. Keep the sash down during this time

Ensure the waste container for aqua regia is separate from other containers and avoid mixing it with piranha or other acid waste

True or False aqua regia is not recommended for routine cleaning of glassware *

True

False

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