https://www.google.co.in/search?q=test+for+anions&biw=360&bih=511&tbm=isch&prmd=ivn&source=lnms&sa=X&ved=0ahUKEwjBp_nxnqPLAhUNBI4KHSobC1gQ_AUICCgB&dpr=1.5#tbm=isch&q=apparatus+used+in+gravimetric+analysis&imgrc=4sPrYKqvuvUY-M%3A
Dear Students, you have the apparatus used in gravimetric analysis in this link.