Which is a correct step in a scientific experiment involving acids and bases? a) Mixing two acids to form a neutral solution.
b) Using an indicator to measure the hydrogen ion concentration of a solution.
c)Pouring acid onto an indicator to measure the pH of the indicator.
d) Dissolving an indicator in an acidic solution to increase its pH.

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=