Suppose 100ml of perchloric acid is neutralized by exacly 46.9 ml of 0.75m lithium hydroxide. what is the concentration of the perchloric acid?

0.352M

Explanation:

First, we need to write a balanced equation for the reaction between perchloric acid and lithium hydroxide. This is shown below:

HClO4 + LiOH —> LiClO4 + H2O

From the balanced equation above, we obtained:

nA (mole of the acid) = 1

nB (mole of the base) = 1

Data obtained from the question include:

Va (volume of the acid) = 100mL

Ca (concentration of the acid) =?

Vb (volume of the base) = 46.9 mL

Cb (concentration of the base) = 0.75M

Using CaVa/CbVb = nA/nB, the concentration of the acid can obtained as follow:

CaVa/CbVb = nA/nB

Ca x 100 / 0.75 x 46.9 = 1

Cross multiply to express in linear form

Ca x 100 = 0.75 x 46.9

Divide both side by 100

Ca = (0.75 x 46.9) /100

Ca = 0.352M

Therefore the concentration of the acid is 0.352M

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .