ابي جواب حق 3 اسئلة ضروري
و التسليم باجر ياريت تساعدوني
1)A 35.2mL, 1.66M solution is mixed with 16.7mL of 0.892M solution. Calculate the concentration of the final solution.
2)How many grams of are required to precipitate most of the ions from 2.50x10 mL of 0.0113M solution? Write the net ionic equation for the reaction.
3)A sample of iron ore (containing only Fe+2 ions) weighing 0.2792g was dissolved in dilute acid solution. and all the Fe(ll) was converted to Fe(lll) ions . The solution required 23.30mL of 0.0194M K2Cr2O7 for titration. Calculate the percent by mass of iron in the ore.
