Answer me number 1-5

...no effect on litmus paper. This is because ammonia does not ionize in methylbenzene to produce hydroxide ions ($OH^-$), which are responsible for basic properties.

a) Calculate the number of moles of $H_2SO_4$.
Volume of $H_2SO_4 = 25.0 \text{ cm}^3 = 0.0250 \text{ dm}^3$.
Concentration of $H_2SO_4 = 0.100 \text{ mol dm}^{-3}$.

b) Calculate the number of moles of $NaOH$ that reacted.
The balanced chemical equation is:

From the equation, $1 \text{ mole of } H_2SO_4$ reacts with $2 \text{ moles of } NaOH$.

c) Calculate the concentration of the $NaOH$ solution.
Volume of $NaOH = 20.0 \text{ cm}^3 = 0.0200 \text{ dm}^3$.

a) The type of reaction that occurs when $H_2SO_4$ reacts with $NaOH$ is a neutralization reaction.

b) A common indicator used in this titration (strong acid-strong base) is phenolphthalein.

a) If phenolphthalein is used, the colour of the indicator in the conical flask (containing $H_2SO_4$) at the start of the titration is colorless.

b) If phenolphthalein is used, the colour of the indicator in the conical flask at the end-point of the titration is pink.

a) Apparatus A is a burette.

b) Apparatus B is a pipette.

c) Apparatus C is a conical flask (or Erlenmeyer flask).

d) Apparatus D is a retort stand (with a clamp).