Concentration of sodium chloride ions in a solutionPredictionIf I double the concentration of sodium chloride ions in a solution, the current that can flow through the circuit will also double.Controlled variables* Temperature : room temperature -15ºc* Voltage: 6 V* Water volume: 200 cm³* Equipment: see diagramDiagram=======How to obtain concentration* 0.5 M = 5.85 g in 200 cm³* 1 M = 17 g in 200 cm³* 1.5 M = 22.85 g in 200 cm³* 2 M = 34 g in 200 cm³* 2.5 M = 39.85 g in 200 cm³ Method======* Prepare all equipment* Turn on the circuit* Note the first current detected* Turn off the circuit.Results==== ===Using different equipmentUsing the same equipmentConcentration (m)Current (A)Current (A)0.50.441.9211.931.731. 51.982.0722.222.412.51.162.55AnalysisI found that the results follow a trend. The trend is that the points on the graph are on a straight line, which curves towards the top right corner of the graph. The last point on my chart was lower than I expected, hence the curved line towards the end of the chart. I have also found that as the concentration increases, the current also increases. I drew two lines that best fit my graph, because the first line I drew did not go through all the points but went through (0,0) while the second line went straight through three points, which were points two, three and four. The reason why the first line fits better