Because pH paper doesn't like to get dipped.

Solution A: Bismuth nitrate (0.17g) in AcOH (2mL) and H2O (8mL) Solution B: KI (4g) in AcOH (10mL) and H2O (20mL) Mix Solns. A and B and dilute to 100mL with H2O.

A good practice in titration is to perform a rough titration to estimate the volume of titrant needed, followed by careful and slow addition of titrant near the end point to ensure accuracy. It is important to swirl the solution gently during titration to ensure proper mixing. Finally, make sure to record the exact volume of titrant added at the end point.

Dragendorff's reagent typically consists of a mixture of potassium bismuth iodide (KBl3) and bismuth triiodide (BiI3) dissolved in a solution of acetic acid. This reagent is commonly used in chemistry for detecting alkaloids and alkaline earth metals.

No. There are none, one or infinitely many solutions. No other value is possible.

A system of two linear equation can be represented by two straight lines in space (of 2 or more dimensions).

Such lines can be non-intersecting (0 solutions),

or they can intersect at one point (1 solution),

or they can be coincident (infinitely many solns).

Two non-intersecting lines in 2-d space must be parallel but in spaces of 3 or more dimensions they can simply be non-coplanar. For example, imagine you are in a cuboid room. One line is the join of the walls to your left and behind you, the other line is where the floor meets the far wall. These lines are not parallel but they do not meet.

No. There are none, one or infinitely many solutions. No other value is possible.

A system of two linear equation can be represented by two straight lines in space (of 2 or more dimensions).

Such lines can be non-intersecting (0 solutions),

or they can intersect at one point (1 solution),

or they can be coincident (infinitely many solns).

Two non-intersecting lines in 2-d space must be parallel but in spaces of 3 or more dimensions they can simply be non-coplanar. For example, imagine you are in a cuboid room. One line is the join of the walls to your left and behind you, the other line is where the floor meets the far wall. These lines are not parallel but they do not meet.