The reaction between sodium and chlorine to produce sodium ions and chloride ions. Atoms gain lose or share electrons to end up with a full outer shell. Compounds containing ions are called ionic compounds.
Year 10, writing fully balanced chemical equations homework
A whole lot of the chemistry you have studied this year comes together in this exercise.
ions and how they are formed.
naming ionic compounds and writing their formula
…….. and finally the last piece in the jigsaw writing a fully balanced chemical equation.
If you study NCEA chemistry at level 1 next year a rough guide is
Achievement: writing word equations.
Merit: Inserting chemical formulae into an equation.
Excellence: producing a fully balanced chemical equation.
Revise what we did today by watching the video then do the short exercise. In your notebook write down the word equation and complete it (achievement) Underneath the word equation insert the chemical formula of each substance (merit). Finally balance the equation (excellence) NOTE this usually involves sticking 2 in front of something
Head up homework with the date. Copy the table below into your book. Imagine mixing a solution from the left hand column with a solution from the top row. If a precipitate forms when the solutions are mixed write the name of the precipitate on the grid. If no precipitate results write “no precipitate” on the grid. Use the solubility rules from your book or from the previous post.
The first example is done for you:
mixing copper nitrate and sodium hydroxide solutions.
step 1 write the word equation and switch the names around
Salts are very often water soluble, if you stir them in water they dissolve and go into solution. Flick through the presentation to slide 4 and use the solubility rules to do the homework exercise. You can watch a precipitation reaction after slide 5.
Put the date in your book. Copy in the list and predict whether each salt is soluble in water or insoluble. The first one is done for you