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- when copper reacts with sodium hydroxide what colour precipitate forms?
- For the steel to be stronger than iron, what is the maximum amount of carbon that can be mixed with iron?
- how many jobs does an enzyme have
- what colour is copper in the bunsen flame?
- what are the properties of low carbon steel (0.1% - 0.3%)?
- A buffer solution is prepared by mixing 200cm3 of 2.00moldm-3 propanoic acid, CH3CH2COOH, with 600cm3 of 1.00moldm-3 sodium propanoate, CH3CH2COONa. Ka for CH3CH2COOH = 1.32 × 10-5moldm-3 What is the pH of the buffer solution?
- Results of actions (past participles)
- Which corrodes easier - pure iron or steel?
- Which 2 electrophiles do we need to know how to do electrophilic addition with?
- what colour is calcium in the bunsen flame?
- The student plans to make a buffer solution of pH4.00 from a mixture of CH3COOH(aq) andCH3COONa(aq). The student mixes 400cm3 of 0.204moldm−3 CH3COOH(aq) with 600cm3 of CH3COONa(aq). Calculate the concentration of CH3COONa(aq) needed to prepare this buffer solution of pH4.00.ka= 1.78 × 10−5
- what colour is sodium in the bunsen flame?
- what colour is lithium in the bunsen flame?
- what colour is potassium in the bunsen flame?
- for a first order reaction- rate/ conc graph how do you workout k
- when calcium reacts with sodium hydroxide what colour precipitate forms?
- What colour will the litmus paper turn if chlorine is present?
- does [Co(NH2CH2CH2NH2) 3] 2+ have cis and trans isomerism
- What do enzymes do to a chemical reaction
- Compound A contains bromine and fluorine only, and has a boiling point of 41°C. 1.26g of compound A is heated to 80°C. The volume of gas produced is 0.209dm3. Under the conditions used, 1mol of gas molecules has a volume of 29.0dm3. Determine the molecular formula of compound A.