Chemistry Homework Assistance
QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.
You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.
- 13. Of the Average Atomic Mass, Atomic Number, and Mass Number, which of the above can be found on the periodic table? 14. Where is most all of the mass (Over 99.99999% ) of an atom located? 15. Where is most all of the volume (Over 99.99999% of the atom located? 16. Write/draw me the isotope notation for Sodium, with a mass number of 23, and a+ charge.
- Identify the correct COSHH symbols. Drag and drop the correct answer to the correct space. Caution Correct Incorrect
- est 1. Give examples of a green chemistry solution that involve safer chemicals.(10 min) 2. Explain what cleaner production means. Which principle of green chemistry best explains in cleaner production Discuss the concept of green chemistry principles and how they influence the design and optimization of cleaner production processes. Reflect on the points you raised during the discussion. (15 min) 3. Discuss or debate on the importance of cleaner production in addressing global environmental challenges Reflect on the points you raised during the discussion or debate. (10 min) 4. What misconceptions or alternative conceptions do students have on green chemistry and cleaner production concepts? Use your teaching experience to explain each misconception (13min)
- (a) The table below shows the standard reduction potentials for four half cells Study it and answer the questions that follow. Number Half-reaction Evolts I Ag_((aq))^++2e^-leftharpoons Ag_((s)) +0.80 II Cu^2+_((aq))+2e^-=Cu_((s)) +0.34 III Pb^2+_((aq))+2e^-leftharpoons Pb_((s)) -0.13 N Zn^2+_(aq))+2e^2+Zn_((s)) -0.76 (i) - Identify the strongest reducing agent (1 mark) __ Predict whether or not a solution of copper (II) nitrate can be stored d in a container made of lead (2 marks) __ In the space provided draw a labeled diagram of the electrochemical cell that would give the hest emf. (3 marks) (iv) Calculate the E'' of the electrochemical cell constructed in (iii) above (1 mark)
- 3. NB! Use the anhydrous copper sulphate immediately. 4. With the assistance of a spatula or glass rod place/pour a little of the anhydrous copper sulphate in each of the four test tubes. 5. Use a pipette to add a few drops of water to the first test tube Note the change observed __ 6. Repeat this procedure by adding a few drops of paraffin to the anhydrous copper(II)sulphate in the second test tube, cooking oil in the third test tube and vinegar to the fourth test tube Use a clean pipette each time! 7. Record the colour in each case in the table below. Name of liquid Copper sulfate colour Cobalt chloride colour (4) Water Paraffin square square Cooking oil square square square square Vinegar square square 8. Using the same pipettes, place a drop of water, paraffin, cooking oil and vinegar on a piece of cobalt chloride paper Space the drops carefully so that they do not run into each cobalt chloride paper test liquid 9. Note the colour of the cobalt paper each time and record your colours in the table above. 10. From this experiment what can you deduce about the test for water? (2) __