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The rate of reaction between marble chips and hydrochloric acid can be increased by: a) increasing the concentration of the hydrochloric acid, b) increasing the temperature of the hydrochloric acid. Explain why in terms of the reacting particle model.(6)

(For a reaction to occur, reactant particles must collide and interact with each other in some way.The rate of a chemical reaction is proportional to the number of collisions between reactant molecules.) Inc...
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Answered by Liz E. • Chemistry tutor
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‘Conservative electoral success in the years 1951-1964 was mainly due to rising living standards’ Assess the validity of this view

AGREE-DUE TO RISING LIVING STANDARDS Increase in weekly wages, more affluence seen through cars and TVs, the use of give away budgets by the Conservative chancellors such as - £134 million in 1955 and £370 i...
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Answered by Honey B. • History tutor
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if f(x) = 4x^2 - 16ln(x-1) - 10, find f'(x) and hence solve the equation f'(x)=0.

f(x) = 4x 2 - 16ln(x-1) -10, f'(x) = 8x - 16/(x-1), so if f'(x)=0, then 8x - 16/(x -1)=0, 8x(x-1) - 16 = 0, 8x 2 - 8x - 16 =0, 8(x 2 - x - 2) = 0, x 2 - x - 2 = 0, (x - 2)(x + 1) =0, so x = 2 and x = -1
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Answered by Ellie B. • Maths tutor
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What is the best way to structure an essay?

The best essay structures offer clarity and usually stick to a clear format depending on a word count or a time limit. An introduction to an essay does not need to always pinpoint every argument that will be...
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Explain why successive ionization energies of an element increase

More energy is required to remove successive electrons from an ion with an increasing positive charge. There is large increases in ionization energy when the 2nd and 10th electrons are removed. This means th...
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Answered by Roisin N. • Chemistry tutor
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