The ratio of ions needed to produce neutral potassium chloride is 1:1. This means that there must be an equal number of potassium and chloride ions in order for the compound to be neutral. If there are not an equal number of ions, the compound will have a net positive or negative charge. For example, if there are more potassium ions than chloride ions, the compound will have a net positive charge. This is because potassium ions are positively charged and chloride ions are negatively charged.