What color does alka-seltzer turn when you add cabbage juice and vinegar?
It will turn a hue of pink. The reason of this is that Red Cabbage Juice is an indicator, which is used to see wether an object or chemical is an acid or a base. If the object is an acid it will turn a hue of pink, and if it is a base, it will turn a hue of blue. Which is why vinegar mixed with Red Cabbage Juice will turn pink.