Moles and molar concentration
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- Find the number of moles and concentration of substances used in chemical reactions.
- Find the number of moles and use it to find the volume of substances used in chemical reactions.
- Find the number of moles and use it to find the molarity of substances used in chemical reactions.
- In a titration reaction, 32 mL HCl of unknown concentration reacts with 25 mL of 0.5M NaOH . Calculate the molarity of the hydrochloric acid being analysed.
- In another titration reaction, it took 14mL of NaOH of unknown concentration to react with 39 mL of 0.1M HPO. Calculate the molarity of the NaOH solution used.
- Find the number of moles and use it to find the quantities of substances used in chemical reactions.
Consider the reaction:
2 Al2 NaON2 HO→2 NaAlO3 H
- A student needs to produce 20L of H at STP using this reaction. Excess water and aluminium is available to react with 1.5M sodium hydroxide solution. How much sodium hydroxide solution will be required?
- When repeating the experiment, only 500 mL of 2.2M sodium hydroxide solution is available. How many litres of hydrogen gas can be produced given this limit?