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The chemical equation is: 2KOH + H2SO4 ---> K2SO4 + 2H20. I still don't get it...

A student used the titration process to determine the concentration of a potassium hydroxide solution. She found that 25ml of a 0.1mol/L sulphuric acid solution reacted with exactly 10ml of the potassium hydroxide solution. Calculate the concentration of the potassium hydroxide solution. I...

It was just an example to see how the moles thing work. Anyway, thank you for your input as well.

Thank you so much!

I see. So if it was H2SO4, then the moles of Hydrogen must be multiplied by 2? Is that right?

A student carried out an investigation to analyse the sulphate content of lawn fertiliser. The student weighed out 1g of fertiliser and dissolved it in water. 50ml of 0.25mol/l barium chloride solution was then added. A white precipitate of barium sulphate formed, which weighed 1.8g...

How do you cross them? Can anyone show me how to do a Punnett square for dihybrids?

Thank you so much! Now I get it!

so polyploidy is like having 3 or more chromosomes for all 23 sets of chromosomes?

So technically, trisomy is polyploidy in one set of chromosome?

So polyploidy means an extra SET/PAIR of chromosomes in ALL 23 sets of chromosomes?

I get what trisomy is now. But can you explain polyploidy with more detail? I'm still unsure of what it is. About the dominant/recessive question, I was asking about defects, not mutations. Haha.

OK, so in other words, trisomy is an extra chromosome on any of the 23 sets of chromosomes? Also, when you say "extra set of chromosomes", does it mean a pair of chromosomes?

How do we know whether if a defect is recessive/dominant? Also, if you can, please explain the difference between trisomy and polyploidy to me. Thanks!

Hi guys. I was reading Andrew Harvey's notes and I saw this : 5. assess the effects of the development of AC generators on society and the environment AC generators allow for the production of AC electricity which can be supplied to the public. This affects society greatly allowing for...

A curve has d^2y/dx^2 = 8x and the tangent at (-2,5) makes an angle of 45 degrees with the x-axis. Find the equation of the curve. I integrated 8x and got 4x^2 and subbed the x value into it. Where do I go from there? Any hints?

it's the latter... I'll post the question.

Can you show me how? Because after multiplying all terms by x, i get x=0. Which is weird.

Sketch y = √x+5 for -4<x<4 and find its maximum and minimum values. I differentiated it to get stationary points. But I ended up with this: 1/x+5 = 0