run something into something. 1. to guide or route something, such as a wire or a pipe, into something or a place. The worker ran the circuit into each room. He ran in the circuit as specified. 2. to guide something into something; to drive or steer something into something else.
A change of color to a blue-black or purple color suggests that starch is present. If there is no change in color, this suggests no starch is detectable. Note the change of the iodine to black on the potato (right) but not the apple (left). (10% Tincture of iodine.) Potato contains starch, but apple does not.
Left flask: before the endpoint, the colour of the solution reflects the bright orange colour of fresh orange juice. Centre flask: Once all the ascorbic acid has been oxidised, a slight excess of added iodate forms a starch-iodine complex, a green colour in this case. This is the endpoint of the titration.