Carry out risk assessments for specific chemical hazards. Look up the hazards associated with the use of the following chemicals and list the appropriate protective measures required to minimise the risk during use in a lab class: (a) ethanol to be used as a recrystallisation solvent for a solid (about \(10 \mathrm{~g}\) ); (b) sodium oxalate to be used to make a volumetric standard solution \((250.00 \mathrm{~mL} ; 0.1 \mathrm{M})\); (c) sodium hydroxide, used in solid form to prepare a dilute solution for neutralisation.

Ethanol's major hazards are its flammability and potential for causing dizziness and eye irritation. Protective measures include using in a well-ventilated area, wearing gloves and safety glasses, and keeping it away from ignition sources. Sodium oxalate is harmful if swallowed and can cause skin and eye irritation. Appropriate protective measures include wearing gloves and eye protection, avoiding dust formation, and thoroughly washing hands post handling. Sodium hydroxide causes severe skin burns and eye damage. It is harmful when inhaled and may be corrosive to metals. Use protective gloves, eye and face protection, and promote good ventilation. Avoid contact with skin, eyes, clothing, and avoid breathing its dust or fumes.