Naming Chemical Compounds General Information: Scientists all around the globe use a standard method for naming chemical compounds. The standards were set up by an international committee sponsored by the International Union of Pure and Applied Chemistry (IUPAC). Having this standard makes life easier for people who use these compounds everyday. It would be tough to set up any experiment if scientists everywhere used different names for the same compound. It would also make the lab a
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Hydrogen + Chlorine → Hydrogen chloride Ans. H2 (g) + Cl2 (g) → 2HCl (g) (ii) Sodium + Water --> Sodium hydroxide + Hydrogen Ans: 2Na (s) + 2H2O (liq) → 2NaOH (aq) + H2 (g). Q.3. Write a balanced chemical equation with state symbols for the following chemical reactions: (i) Solution of barium chloride and sodium sulphate in water
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yield us silver chloride which is a solid. We did note on our observation that we had a change in color and a solid precipitate. 3. Na2CO3(aq)+ HCl(aq) → NaCl(aq) + HCO3(aq) Na2CO3 + 2HCl → 2NaCl + H2O + CO2(aq) 2Na+ + CO32- + 2H+ + 2Cl- → 2Na+ + 2Cl- + H2O + CO2 CO32- + 2H+ → H2O(l) + CO2(g) With this reaction the carbonate and the diatomic hydrogen combined together to make the bubbling effect that we had noted. This leaves us with the water molecule with the sodium chloride dissolved in it
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dissolved in the ground water. These minerals include Ca 2+‚ Mg2+‚ Fe3+‚ SO42-‚ HCO3-. When this water evaporates or boils‚ the difficult to dissolve metal salts remain as a scaly residue. Hard water inhibits the effectiveness of soap and detergents. Calcium ions typically make the most significant contribution to water hardness. This is why hardness is measured in terms of mg CaCO3/L of solution. Hardness is also reported in units of parts per million (ppm). Water with a hardness value of < 60 ppm
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precipitates result from the exchange of positive and negative ions between reacting solutions of two ionic compounds. Thus‚ in this example the precipitate must be either silver chloride‚ AgCl or sodium nitrate‚ NaNO3. Sodium nitrate dissolves readily in water and is therefore soluble. Thus we can conclude that silver chloride is the insoluble precipitate. We can represent the formation of this precipitate by a net ionic equation: Ag+ +NO3 ̄ +Na++Cl ̄→AgCl+NO3 ̄+Na+ Net: Ag+ (aq)+Cl ̄ (aq)→AgCl(s)
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trouble-free boilers. However‚ this is one of the important factors‚ together with others‚ that must be properly controlled if the boiler is to be kept clean. Chloride Test Chloride ions‚ unlike other ions that enter the boiler‚ are extremely soluble and do not precipitate or decompose when subjected to boiler conditions. Therefore‚ chlorides are
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yield product was a butyl derivative of malonic ester that was isolated by adding water to the reaction solution‚ and extracting with ether. The ether was dried and evaporated to give the product. Procedures: 0.039g of tricaprylmethylammonium chloride‚ 0.358g of 1-bromobutane‚ 0.416g ofdiethyl malnote‚ and 0.414g of potassium carbonate were mixed in a 5mL long-necked‚ round-bottom flask. The apparatus was set up according to figure 42.1. The distillation column was attached to be used as an air
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einen Bogen überzugehen. Dieser Bogen wird Impulskurve genannt. Während der Impulskurve neigt sich der Körper leicht nach innen. Diese Schräglage bewirkt‚ dass der Körperschwerpunkt (KSP) sich nicht mehr senkrecht über die Aufsatzstelle der Füße befindet‚ sondern nach innen/unten verlagert wird. Diese Absenkung des KSP führt zu einer Verlängerung des Beschleunigungsweges für den Absprung. [pic] Die Länge und die Geschwindigkeit des Anlaufs‚ sowie der Radius des Kreisbogens und die Gestaltung der
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dioxide + oxygen sulfur trioxide 2SO2 (g) + O2 (g) 2SO3 (g) Oleum Absorption: sulfur trioxide + sulfuric acid oleum SO3 (g) + H2SO4 (l) H2S2O7 (l) Oleum Dilution: oleum + water sulfuric acid H2S2O7 (l) + H2O (l) 2H2SO4 (l) ELECTROLYSIS of Sodium Chloride: Molten NaCl: Overall reaction: 2NaCl (l) 2Na (l) + Cl2 (g) Half-equations: 2Cl− (l) Cl2 (g) + 2e− Na+ (l) + e− Na (s) Concentrated NaCl: Half-equations: 2Cl− (aq) Cl2 (g) + 2e− 2H2O (l) + 2e− H2 (g) + 2OH− (aq) Dilute NaCl: Half-equations:
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supervision of a teacher Safety goggles must be worn when working with acids. Factors Affecting Reaction Rate EQUIPMENT AND MATERIALS Part 1. Effect of Particle Size solid zinc‚ approx. 0.5 cm × 2 cm‚ or solid marble chips zinc powder or calcium carbonate powder balance 2 test tubes 1M HCl (approx 10 mL per group) Part 2. Effect of Temperature 3 Alka Seltzer tablets 3 250-mL beakers water at three temperatures – with ice‚ room temperature‚ warm (around 70°C) Part 3. Effect of Concentration
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