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- Write an ionic equation for the reaction between chlorine and cold dilute sodium hydroxide solution. Give the oxidation state of chlorine in each of the chlorine-containing ions formed.
- (ii) Give the oxidation state of manganese in the MnO4− ion.
- contribute 80% of total milk proteins
- Chlorine behaves as an oxidising agent in the extraction of bromine from seawater.In this process, chlorine gas is bubbled through a solution containing bromide ions.(i) simplest ionic equation for the reaction of chlorine with bromide ions.(ii) Give one observation that would be made during this reaction(iii) In terms of electrons, state the meaning of the term oxidising agent.
- Medicines for the treatment of nervous disorders often contain calcium bromide. Silver nitrate, acidified with dilute nitric acid, can be used together with another reagent to test for the presence of bromide ions in a solution of a medicine.Describe briefly how you would carry out this test and state what you would observe.
- anomalies de la biosynthèse et de l'action des androgènes chez les hommes touche :
- structure venant cloisonner le cloaque en deux pour donner le sinus urogénital et le sinus anorectal
- What are the 2 structural conformations of solid polymers ?
- The reaction between magnesium and sulfuric acid is a redox reaction. Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g) (i) Use oxidation numbers to identify which element has been oxidised. Explain your answer. element oxidised ......explanation .....
- Barium reacts with water in a redox reaction. Ba(s) + 2H2O(l) → Ba(OH)2(aq) + H2(g) (i) Explain, in terms of electrons, what is meant by oxidation.
- What is tacticity and it's different conformations
- fungi that grow as multicellular filaments
- lower the ph is the more acidic it is given
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- (ii) A student heats 5.29 g of Sr(NO3)2 and collects the gas at room temperature and pressure, RTP. 2Sr(NO3)2(s) → 2SrO(s) + 4NO2(g) + O2(g) Calculate the volume of gas, in dm3 , obtained by the student at RTP. Molar mass of Sr(NO3)2 = 211.6 g mol -1 .
- direct flow of milk below legal temperature back into raw supply for reheating
- The element strontium forms a nitrate, Sr(NO3)2, which decomposes on heating as shown below. 2Sr(NO3)2(s) → 2SrO(s) + 4NO2(g) + O2(g) (i) Using oxidation numbers, explain why the reaction involves both oxidation and reduction.
- (ii) The student had added the exact amount of calcium required to react with the hydrochloric acid used. After carrying out the experiment, the student accidentally added some more calcium. The student was surprised that the extra calcium still reacted. Explain this observation. Include an equation in your answer.
- What are the caractéristics of Thermoplastic polymer's chains ?
- A student prepared an aqueous solution of calcium chloride by reacting calcium with hydrochloric acid. Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g) (i) Using oxidation numbers, show that this is a redox reaction.