Ablution with Muddy Water
Question :

Is the ablution valid when it is performed using muddy water, or water containing sugar or salt?

Answer :

It is permissible to perform ablution with the water if the percentage of salt, sugar or mud in it is so low that it is still conventionally considered as water.

Previous Parts of the Wudhu Becomes Dry
Question :

When one starts washing or wiping a part and the previous parts have dried what happens?

Answer :

If all the past wiped parts were dry because of a delay in the Wudhu process or being busy in other things, then the Wudhu is void. The Wudhu is not void if they were dry for another reason or if not all of them were dry.

Continuity of the Wudhu
Question :

Is the wudhu valid if one washes his face in the bathroom but does the rest of the wudhu in the kitchen, and he is walking while wiping his face?

Answer :

This does not invalidate the wudhu, and it is permissible to wash the face and arms while walking.

Sequence
Question :

A person was making a mistake in the sequence of his wudhu for some time, whereby he used to wash the left arm first and then the right arm. Are his previous prayers valid?

Answer :

It is a condition in the correctness of the wudhu to wash the right then the left arm. Not offering the wudhu in this sequence makes it void and the prayers should be repeated.