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Consider contamination of the test tube or apparatus. And also hydroxide solution like Ca(OH)2[lime water] react with CO2 to form white precipitates.i hope this kinda helps. i dont think temperature has anything to do with precipitation but can affect solubility[which is negligible].

The main examples given in the chem syllabus are ethene and oxygen. But if u think about it the haber process is not a combustion reaction. C2H4 + 0.5 O2----->>> ethylene oxide [i think this has a Ag catalyst at 250degrees c] C2H4 + 0.5O2----->>> acetalehyde [this has a palladium...

does HCl dissolve with water vapour when left open in a room or does it react with atmospheric compounds like CO2. kind of confused which is which. lol.

apparently my Geo teacher put a tooth in coca cola(carbonic acid) and left it for 4 days. It dissolved. <<<<<This is scary>>>>>>.:eek:

What is the General equation for adding salt in a soft drink and rapidly decarbonating it? {mixed up bcoz NaCl is a neutral salt and H2CO3 is a relatively weak acid} Can somebody provide a general explanation on this.

Basically it is asking u to name and classify the reactants as strong/weak acids and/or bases eg a strong acid and a strong base give a neutral salti.e. Sodium Chloride {from sodium hydroxide and Hydrochloric acid}. i think in ua task u also hav to consider whether or not the salts react with...

. My organic chemistry textbook says "1-10 hours at 60-110o C." this is the industrial amount of time. It is quite impossible for an average chemistry lesson in New South Wales:cool:

it all depends on many factors. I.e amount of water, type of heating(water bath or direct heatin), Current atmospheric conditions. and e.t.c. But also water generally boils at 100 degrees celcius. Water is usually the least volatile substance in a reflux. There is no exact temperature as it...

Read Dot point physics on the particular dot pt. Then expand ua knowledge with Jacaranda physics. U should be alrite. If the explanations dont make sense go to Macquarie physics.

Generally prac exams do analyse on how detailled and thorough ua understanding is on the module in question. It is very important to identify and have the ability to analyse the reliability and validity of a prac. Always be careful and read the detail as fast as possible and as carefully as...

dats basically wat u need to do. But if u r having problems i woud advise u to go to yr 11 physics.:)

Kanye West -Flashing lights TTBZ anthem-j squad Dream Catch me- Newton Faulkner these are my top 3 songs but i also like alot of Michael jacksons songs and a few classics and Christian songs. Am a variety guy.

Most exciting topic in biz so far. i luv the math stuff compared to the theoretical analysis of the other topics.

english is interesting. i am 80% yes and 20% No. I just like the concept of textual analysis and opinionated perspectives on an issue.

go read magneting braking it will seriously help with ua understanding of lenz's law and direction of force. [use Jacaranda Physics]

I think the main reason ferromagnetic iron is used is because its the most efficient to use in terms of power and heat loss. Ferromagnetic materials usually intensify the magnetic field and this would increase the heat produced by an induction cooktop bcoz of the eddy currents produced. [not...

Most books i have used have focused on the motor effect and how the voice coil and the external magnetic field affects the volume and pitch. This qsn is usually about 4marks the most it can give is 5marks.

My advice would be to learn both but also the exam will mainly focus on AC induction motors. Check HSC online.

Well its basically because of changing pressure which causes the different striations. But also remember in low pressure atoms(usually Argon) are easily ionised in the tubes. Striations are due to the lack of constant ionisation of gas particles causing different glows with decreasing pressure...

Luv conics after practicising it. totally luv it.