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0.1 M sodium hydroxide (strong base) is added to 25 ml of 0.1 M of ethanoic acid (weak acid) in a titration. What is the pH at equivalence?

The equivalence point is reached when the titrant added neutralizes the titrand. It is thought that when a solution is neutral it would have a pH of 7. However, the combination of a weak acid and a strong...

SP
Answered by Sean P. Chemistry tutor
12788 Views

Factorise: y = x^2 + 5x + 6

With quadratic equations, there are two ways in which to answer
Firstly (and most simply), look for two numbers that multiply to make c and add up to make b in the equation y = ax2 + bx +...

AN
Answered by Adnan N. Maths tutor
5939 Views

Can you show me why the integral of 1/x is the natural log of x?

We can break this down into steps, going deeper each time. First we might just say: well, since integration is fundamentally the inverse process of differentiation and we know that the derivative of ln(x)...

JL
Answered by James L. Maths tutor
10372 Views

What is the function of T-helper cells?

T-helper cells are a kind of lymphocyte that are a key part of the adaptive immune system. The adaptive immune system is largely coordinated by T cells, of which there are several types, and B cells, the ...

TF
Answered by Theo F. Biology tutor
9931 Views

How do you expand brackets?

Let's have a look at a pair of brackets: (a+b)(c+d)To expand these brackets each value in one bracket must be multiplied by all values in the other bracket separately then added together. So we have: ac+a...

PB
Answered by Phoebe B. Maths tutor
4217 Views

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