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Chemistry

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Marianne Hagenes

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Cards in this guide (14)
Which of the following is a strong acid

HCI (Hydrochloric acid)

An increase in temperature will cause the rate of a chemical reaction to

increased temperture causes rate or reaction to increase.

What is the equation for reaction rate

For a reaction whose slowest step is

mX + nY ----> aXY

rate = k * [X]m * [Y]n

where k is the rate constant; brackets represent concentrations; m and n are exponents on the concentrations of X and Y, respectively

What happens to the reaction rate as the reactants get used up in a reaction

The rate of the reaction begins to decrease as reactants are used up

Which equation is an expression of the rate law

Rate = k[A]m[B]n

What does a high melting point temperature indicate about a substance

Strong Intermolecular Forces attract the molecules

What does it mean if keq1

I suspect it could be " k eq 1" , or "k =1".

How does increasing the temperature affect a reaction

Increasing temperature affects a reaction in two ways:

1) at higher temperatures the molecules are moving around faster and collisions and reactions are more frequent, so the reaction - both forward and reverse - speed up.

2) at higher temperatures, the equilibrium state will shift. In some cases it will shift the equilibrium towards the product. In other cases, it will shift it back towards the reactants.

What would happen to the rate of a reaction with rate law kNO2H2 if the concentration of NO were doubled

the rate would be four times larger. apex

Which of the following Ka values represent the weakest acid

Ka= 1.62 x 10-12

What is Ka for HCN aq H aq CN aq

Ka = [H+][CN-]

---------------

[HCN]

What increases the chance of reaction when two molecules collide

increasing the concentration in the molecue

What is the pH of a solution with H 2.310-6

The pH is 5,6.

What does it mean if Keq is less than 1

Reactants are favored over products in the reaction.

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