Chemistry St Peters3 Word Scramble
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| Question | Answer |
| What are strong acids? | Acids that ionise completely in aqueous solution. |
| Why is an indicator needed in a titration of an acid and an alkali? | To show the end point when the reaction has completed because the solutions are colourless and there is no obvious change. |
| What can be calculated from the results of a titration? | Concentrations of solutions (in mol per dm3/g per dm3) and masses of substances in solution. |
| What is hydration? | In an acid when water molecules surround the hydrogen ions/protons to keep them in solution. |
| What is different between strong and weak acids? | Strong acids ionise completely in aqueous solution whereas weak acids only partially ionise. |
| What is different between strong and weak alkalis? | Weak alkalis only partially ionise in aqueous solution whereas strong alkalis ionise completely. |
| What does H+(aq) represent? | A hydrated proton (hydrogen ion) |
| What type of acid is dilute hydrochloric acid? | A strong acid at a low concentration. |
| In a titration, what is used to measure the known volume of solution that is put into the conical flask in a titration? | A pipette. |
| Why should you repeat the titration several times? | To improve the reliability of the results. |
| Why should one of the solutions be a strong acid or alkali? | So that the end point is sharp. |
| Why is dilute nitric acid a strong acid? | Because it ionises completely in aqueous solution. |
| Which indicator would you use for a titration between a weak acid and a strong alkali? | Phenolphthalein |
| Which indicator would you use for a titration between a strong acid and a weak alkali? | Methyl orange |
| Which indicator would you use for a titration between a strong acid and a strong alkali? | Any acid-base indicator. |
| Name two pieces of apparatus used to measure volumes in titration's and state which one has a tap. | Pipette and burette: the burette has a tap. |
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