Determine how many ml of water you need to remove, by evaporation, if you have a 750 ml of 7.75 M HNO3 dilute solution and you need to make it a 12 M HNO3 stock solution.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

there are two significant figures.