Nope.shouldn't you guys be in school?
Nope.shouldn't you guys be in school?
Yes but it got lead in it.Lead Acid cells are rechargeable
and sulphateYes but it got lead in it.
I'm a bit dodgy on AAS, but I'll give it a go.Describe the nebulisation of the prepared solution and explain the need for the flame in AAS (3)
iStudent asked for the environmental problems with dry cell specifically thoughI don't get what you guys are on about?
A lead-acid cell is rechargeable.
State one environmental impact associated with the dry cell (1mk). This is a hsc q but I'm forcing you to choose dry over lead acid.
Is there another word for nebulisation cos I swear I have never heard that word b4..I'm a bit dodgy on AAS, but I'll give it a go.
Nebulisation: converts the sample to a fine spray which enters the flame
Flame: the flame desolvates the 'wet' aerosol and thermally decomposes the ionic compound containing the metal ions to be tested for into ground state atoms which can absorb light of the frequency emitted by the elemental metal sample in the hollow cathode lamp to reach an excited state.
I usually think of it as the flame atomises the sample (making it into a vapour). But yeah I don't use nebulisation usually. I'd probably chuck it in though so the marker doesn't take off marksIs there another word for nebulisation cos I swear I have never heard that word b4..
Discuss the use of the suitable chemical to minimise acid or base spill. Use appropriate eqns. -5
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When cleaning the spill of an unknown liquid (either acidic or basic), it is important to carefully chose a suitable chemical in order to minimise any damage. One such chemical that may be used is Sodium Hydrogen Carbonate (NaHCO3). This chemical is particularly useful in cleaning spills of acids and bases for multiple reasons.Discuss the use of the suitable chemical to minimise acid or base spill. Use appropriate eqns. -5
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I think this in 2007When was the last time they asked for a named chemist and their role?
Yeah to be honest nebuliser is more reminiscent of that asthma machine thing that what I'd normally say atomiser for me personally. But be careful with wording there, because the flame doesn't atomise the sample, the atomiser/nebuliser does; it enters the flame already atomised (and then is made into atoms, and I guess it's the similarity between those words that make it easier for some people to remember nebuliser instead).I usually think of it as the flame atomises the sample (making it into a vapour). But yeah I don't use nebulisation usually. I'd probably chuck it in though so the marker doesn't take off marks
Weak Ammonium Chlroide solution is corrosive and can be damaging to environment.State one environmental impact associated with the dry cell (1mk). This is a hsc q but I'm forcing you to choose dry over lead acid.
oh wow I didn't know that part. Thanks for clearing it up!Yeah to be honest nebuliser is more reminiscent of that asthma machine thing that what I'd normally say atomiser for me personally. But be careful with wording there, because the flame doesn't atomise the sample, the atomiser/nebuliser does; it enters the flame already atomised (and then is made into atoms, and I guess it's the similarity between those words that make it easier for some people to remember nebuliser instead).