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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) +2H₂O_(l) --> I_2(aq) + H_2(g) + 2OH^-_(aq), the anode reaction is 2I^-_...

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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-5T...

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)

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...

Answered by Luqman B. • Maths tutor

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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 facto...

Answered by C C. • History tutor

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