Chemistry Homework Assistance
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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.
- 0 1 2 Name an indicator that could be used to test if the solution is acidic. Give the result of the test. [2 marks] __ Result Question 1 continues on the next page
- An experiment is planned to record the change in pH as a powdered base is added to 50cm^3 dilute hydrochloric acid The method suggested is step 1 add dilute hydrochloric acid up to the 50cm^3 mark on a beaker; step 2 add one spatula of the base and stir; step 3 measure the pH of the mixture; step 4 repeat steps 2 and 3 until the pH stops changing. (i) State how you could change the method so that the amounts of dilute hydrochloric acid and of the base can be measured more accurately. dilute hydrochloric acid __ base __
- Titanium is extracted from litanium dioxide in a two-stage process. The equation for the first stage in the process is: TiO_(2)+2Cl_(2)+2Carrow TiCl_(4)+2CO Calculate the volume of chlorine gas needed to react completely with 100 kg of titanium dloxido. Relative atomic masses (A): O=16 Ti=48 The volume of one mole of gas=24dm^3 18 ma
- 161 point What are the correct formulas and coefficients for the products of the following double replacement reaction? RbOH+H_(3)PO_(4) Rb_(3)PO_(4)+3H_(2)O RbPO_(4)+3H_(2)O H3Rb+PO_(4)OH Rb(PO_(4))_(3)+H_(2)O Clear my selection
- 5. A student does a titration using sodium carbonate solution and nitric acid. The equation for the reaction is: Na_(2)CO_(3)+2HNO_(3)arrow 2NaNO_(3)+CO_(2)+H_(2)O 25.0cm^3 of 0.124mol/dm^3 sodium carbonate solution is neutralised by 23.6cm^3 of nitric acid. Calculate the concentration of the nitric acid. Give your answer to 3 significant figures. You should calculate: the number of moles of sodium carbonate in 25.0cm^3 of the solution the number of moles of nitric acid in 23.6cm^3 of the nitric acid the concentration of the nitric acid in mol/dm^3