year 12 rates answers

When you have managed to have a go at the worksheet on the earlier post have a look at the answers here.

rate of reaction answers

Remember to also make sure you are happy with the Maxwell-Boltzmann distribution. Exam questions, particularly the longer type section B variety, commonly focus on this.

year 13 work for paternity leave

Crikey. I'll be glad of a rest on Friday when I'm back in. Anyway, we've nearly finished the first chunk of transition metal chemistry. We've covered transition metal complexes and their uses, catalysis and the variable oxidation state of these metals.

We also need to know about transition metals and colour so you will need to read through pages 219-222 of your A2 text book and make notes on 'the origin of colour' and 'using colour to determine concentration'. We will be doing some practical work to reinforce these ideas on Friday and during the following week.

Also, you will need to ensure that your homework (the 5 past paper sheets I gave you last week) is up to date for Friday.

Finally, seeing as we are coming to the end of a big dollop of transition metal stuff it would make sense to have a small test before Easter, so you might want to make sure you understand everything we've done so far. Use the questions on pages 240 and 241 to check your level of understanding (answers are in the back of the book).

year 12 work for paternity leave

Right then. I'll be back in on Friday, but to keep you going you need to read up about kinetics (rates of reaction) on pages 106-109 of your AS text book. If you didn't get one you'd better sort yourself out with one from the prep room in Science (£20 deposit that you can get back when you return it).

Most of the kinetics stuff eg. collision theory, is very similar to your GCSE work. The only significant new content is the Maxwell-Boltzmann distribution of molecular energies (look it up and make sure you can draw, label and explain the graphs appropriately for different temperatures).

Obviously this is only a short topic for module 2, and should be quite straightforward for you to get to grips with yourself. Make sure you try these questions on the downloadable worksheet below.

rate of reaction

You will need to get some graph paper to complete this. I'll post some answers later in the week.

Also have a look at this to help your understanding of the Maxwell-Boltzmann distribution.

Maxwell-Boltzmann

Finally, try some of the questions on pages 110-111 of the text book to check your understanding (answers are in the back).

a level work

As you may probably know, I will not be in for a few days this week due to the birth of my son Alfie.

Lessons will return to normal on Friday this week.

I will post your work here later on today when I have a bit more time. Please check back this evening and ensure that you endeavour to get up to date by Friday or our next lesson.

Thanks, Mr Smith

hindenburg disaster

LZ 129 Hindenburg was a German zeppelin or airship, and at the time it was the largest aircraft ever built. During its second year of service, it went up in flames and was destroyed while landing at Lakehurst Naval Air Station in New Jersey, U.S., on 6 May 1937, having left Frankfurt, Germany 3 days earlier. Thirty-six people were killed, although surprisingly given the nature of the accident, the majority of the passengers survived. Several theories exist as to the cause of the accident, the most likely of which is a build up of static electriciy on the outside of the airship canopy causing a spark which ignited the hydrogen within.

Modern airships are of course filled with helium, lighter than air but also inert or unreactive. Much safer for all concerned. Except that this could have been used anyway in the 1930's in place of hydrogen. The Americans were already doing so, having discovered large amounts of helium over 30 years previously during drilling operations, and far from being a rare element helium was found to be present in vast quantities under the American Great Plains.

This put the United States in an excellent position to become the world's leading supplier of helium and they began to develop military uses for the gas, including airship use, and set up the National Helium Reserve in 1925 at Amarillo, Texas with the goal of supplying military airships in time of war and commercial airships in peacetime.

However, due to a US military embargo against Germany that restricted helium supplies, the Hindenburg was forced to use hydrogen as the lift gas. Still, without the Hindenburg disaster we might have been deprived of one of the most iconic rock album covers of all time.

bunhead

KS3 pupils from Turton visited the Catalyst Centre in Widnes today where they bore witness to Dr Bunhead's Exploding Energy Show. The show proved to be a big hit with the students and with Mr Smith, who came face to face with his doppleganger and personal hero. Mr Smith (above centre) and Dr Bunhead (above left) agreed that they were both quite good at blowing things up. Watch out with that potato bazooka.

For more Bunhead related antics check out Dr Bunhead's Website

oil strike

Just last month (January 2008) the Anglo-Dutch oil firm Shell reported annual profits of $27.56 bn (£13.9 bn), a record for a UK-listed company. Much of the rise in profits was attributed to rising oil prices, which have nearly doubled since last year. However, the level of profit announced has been described as "quite frankly obscene" and clearly doesn't sit well with many drivers who are paying a premium to fill their cars at petrol pumps around the country.

The oil company itself went to great lengths to stress that little of their profit came from petrol forecourts, with the majority of the price paid at the pump already going straight to the government. Very reassuring.

So, if you think you can make more money than Shell, have a go at the game below where you have been drafted in as the managing director of your own oil exploration company. You will have to answer questions on oil and fractional distillation to ensure the smooth running of the company.

play oil strike