mixture containing about 0.3 g of BaCl2·2H2O and 0.7 g of CaCO3. A large quantity of the mixture should be prepared which can be dispensed to learners. 0.4 mol dm–3 aqueous nitric acid, WARNING 0.4 mol dm-3 HNO3(aq) Causes skin irritation and HNO3(aq) ca. 15–20 cm3 serious eye irritation Currently not classified as hazardous at this concentration 0.05 mol dm–3 aqueous silver 0.05 mol dm-3 nitrate(V), AgNO3(aq) ca. 10 drops Solutions cause skin to blacken and will stain clothing and some bench surfaces. Causes skin and eye irritation 1.0 mol dm–3 aqueous ammonia, 1.0 mol dm-3 NH3(aq) Ensure room is well ventilated NH3(aq) ca. 15–20 cm3 Avoid inhaling vapour 1.0 mol dm–3 aqueous sulfuric(VI) WARNING 1.0 mol dm-3 acid, H2SO4(aq) Causes skin irritation and H2SO4(aq) ca. 2–3 cm3 serious eye irritation DANGER May cause: genetic defects; cancer by inhilation 0.1 mol dm–3 aqueous potassium 0.1 mol dm-3 chromate(VI), K2CrO4(aq) May cause an allergic skin K2CrO4(aq) reaction ca 2–3 cm3 Wear splash-resistant goggles Wear chemical-resistant gloves
mixture containing about 0.3 g of BaCl2·2H2O and 0.7 g of CaCO3. A large quantity of the mixture should be prepared which can be dispensed to learners. 0.4 mol dm-3 HNO3(aq) 0.4 mol dm–3 aqueous nitric acid, HNO3(aq) ca. 15–20 cm3 WARNING Causes skin irritation and serious eye irritation 0.05 mol dm-3 AgNO3(aq) 0.05 mol dm–3 aqueous silver nitrate(V), ca. 10 drops Currently not classified as hazardous at this concentration Solutions cause skin to blacken and will stain clothing and some bench surfaces. 1.0 mol dm-3 NH3(aq) 1.0 mol dm–3 aqueous ammonia, NH3(aq) ca. 15–20 cm3 Causes skin and eye irritation Ensure room is well ventilated Avoid inhaling vapour 1.0 mol dm-3 H2SO4(aq) 1.0 mol dm–3 aqueous sulfuric(VI) acid, H2SO4(aq) ca. 2–3 cm3 WARNING Causes skin irritation and serious eye irritation 0.1 mol dm-3 K2CrO4(aq) 0.1 mol dm–3 aqueous potassium chromate(VI), K2CrO4(aq) ca 2–3 cm3 DANGER May cause: genetic defects; cancer by inhilation May cause an allergic skin reaction Wear splash-resistant goggles Wear chemical-resistant gloves