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A student titrates 25.00 cm3 of hydrochloric acid with 28.60 cm3 sodium hydroxide solution of concentration 0.200 moles per dm3. The equation for the reaction is: HCl + NaOH to NaCl + H2O. Calculate the concentration of the hydrochloric acid.

From the equation given in the question we can see that one mole of hydrochloric acid (HCl) reacts with one mole of sodium hydroxide (NaOH). 

The first thing to do is to work out the numb...

HA
Answered by Hannah A. Chemistry tutor
22997 Views

You are given a square which you are told has a total area of 100 squared centimetres. You are also told that one side of the square has dimension 4(3x + 2), and the other has dimension 8x - y. What are the values of x and y?

The first thing to know is that a square has equal sides, and that the area of a square is length x length.

Therefore in this case

Length x length = 100    or    Length...

HA
Answered by Hannah A. Maths tutor
5315 Views

How do you conjugate regular verbs in the present tense?

ER, IR and AR are the three different endings of Spanish verbs. IR and ER verbs are conjugated in a similar way, and AR verbs in a different way in the present tense. 

With all regular ve...

AV
3204 Views

how do you solve these simultaneous equations?

6x + y = 8 (1)       4x - y = 12 (2)

 

Method 1 elimination:

-Adding/subtracting the two equations together to eliminate one of ...

SG
Answered by Shriya G. Maths tutor
5728 Views

What are the differences between warm and cold based glaciers?

Cold based glaciers:

Are frozen to the bedrock all year round as the temperature of the ice stays at zero degrees constantly

Tend to move via internal defor...

JH
Answered by Joanna H. Geography tutor
45971 Views

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