a buffer is prepared by adding 150 ml of 1.0 m naoh to 250 ml of 1.0 m nah2po4. how many moles of hcl must be added to this buffer solution to change the ph by 0.18 units? if necessary, assume the total volume remains unchanged at 400 ml.

answer: the mildest forms of push polling are designed merely to remind voters of a particular issue. for instance, a push poll might ask respondents to rank candidates based on their support of an issue in order to get voters thinking about that issue. many push polls are negative attacks on other candidates.