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Describe the electrolysis of potassium iodide in water. Include the overall balanced chemical reaction and the electrode reactions

The overall reaction is 2I - (aq) +2H 2 O (l) --> I 2(aq) + H 2(g) + 2OH - (aq) , the anode reaction is 2I - (aq) --> I 2(aq)­­ + 2e - and the cathode reaction is 2H + (aq) + 2e - --> H 2(g) . In aq...
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Answered by Pete H. • Chemistry tutor
61394 Views

How do I work out if two lines are parallel?

The gradients of the two lines must be the same. The gradient is m in the equation: y=mx+c For example: L1: y = 3x – 2L2: 3y – 9x + 5 = 0 First rearrange L2 so it is in the same form as L1 to get:3y=9x-5Then...
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Answered by Alexandra B. • Maths tutor
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What is inflation and how can we measure it?

Inflation is when prices increase we can measure it using CPI and PPI data (basket of goods model)
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Answered by Luqman B. • Economics tutor
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What is the value of sin(theta), cos(theta), tan(theta) where theta = 0, 30, 45, 60, 90

sin(0) = 0 ; sin(30) = 1/2; sin(45) = 1/sqrt(2); sin(60) = sqrt(3)/2; sin(90) = 1cos(0) = 1; cos(30) = sqrt(3)/2; cos(45) = 1/sqrt(2); cos(60) = 1/2; cos(90) = 0 tan(0) = 0; tan(30) = 1/sqrt(3); tan(45) = 1;...
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Answered by Luqman B. • Maths tutor
6249 Views

How accurate is it to say that there were radical improvements in health care in the years 1918-1939?

As with any History A Level question, we need plan the essay, first by finding 3 main body paragraphs. For healthcare these could be access, quality and organisation. Then we need to decide for each factor w...
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Answered by C C. • History tutor
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