No helium needed! E-Z Balloon Sticks and Balloon Cups seal and hold air-filled latex or foil balloons upright eliminating the need for hand-tying of knots. Use with 9 to 17 inch latex balloons or 18 to 20 inch foil balloons.
1 Open the return file in T2Express software first. 2  On page 1 of T2, check the checkbox to indicate request of re-assessment for changes.3  On page 9 of T2, describe what changes are made to the T2 return. Open the return file in T2Express software first. 2  On page 1 of T2, check the checkbox to indicate request of re-assessment for changes.
I2(aq) + 2S2O32-(aq) â 2I-(aq) + S4O62-(aq). The copper(II) ions can also be titrated against a solution of EDTA in a complexiometric titration. The indicator to use is called Fast Sulphon F. An acid-base titration would not at first sight seem to be very helpful.he blue colour of your solution is caused by the Cu2+(aq) ion. The more concentrated the solution the more intense the colour is. You can make up known concentrations of copper(ll) ion solution and use a colorimeter to produce a copper(ll) ion concentration/absorbance calibration curve.