If you can balance these you can balance any equation given in class. Nh 4 no 3 n 2 o h 2 o 6.
Look for elements you have been given a balancing number for.
Balancing chemical equations hard questions. Balancing questions chemical reaction equations to balance equation balancing and stoichiometry calculator. Al 2 o 3 fe fe 3 o 4 al 4. Kclo 3 kcl o 2 5.
Balancing chemical equations practice problems with are the most difficult. The following is a list of over 250 reaction equations that you may try to balance. When balancing equations remember chemical reactions must satisfy conservation of mass.
C 3 h 8 o 2 co 2 h 2 o 2. In aqa exams there are commonly some quite difficult balancing equations questions. Are you ready to try another quiz.
The fe also gets balanced in this step. Ascl3 nabh 4 ash 3 nacl bcl3 which element to start with. Problems with are the most difficult.
They range in difficulty level so don t get discouraged if some of them seem too hard. However you missed some questions so you might want to review the steps to balancing equations or print free practice worksheets if you feel ready to move on learn about mass relations in balanced equations. 2 pick either the o or the mg to balance next.
Just remember to start with the element that shows up the least and proceed from there. Al2o3 fe g fe3o4 al. If you can balance these you can balance any equation given in class.
You completed the quiz so you got practice balancing equations. Balancing chemical equations practice problems try to balance these ten equations on your own then check the answers below. Nahco 3 na 2 co 3 h 2.
C3h8 o2 g co2 h2o. A coefficient number in front of a chemical is multiplied by all the atoms in that chemical. 1 balance the cl note that 2 x 3 3 x 2.
They become more difficult as you progress down the list but keep in mind that evaluation of difficulty level is very individual and approximate. Jose luis pelaez inc getty images good job. Al 2 so 3 3 naoh na 2 so 3 al oh 3 3.
The other element mg or o depending on which one you picked also gets balanced in this step. Check your work to make certain you have the same number and type of atoms on the reactants side as on the products side. There is often an aspect of trial and error and balancing equations but there are some guidelines to follow.
2fecl3 3mgo fe2o3 3mgcl2. Al2 so3 3 naoh g na2so3 al oh 3. 2fecl3 mgo fe2o3 3mgcl2.