Should she do Hajj and give charity on behalf of her mother who did not pray?

Dear Brothers & Sisters,
As-Salaamu-Alaikum wa Rahmatullahi wa Barakatuh. (May Allah's Peace, Mercy and Blessings be upon all of you)
One of our brothers/sisters has asked this question:
Is it permissible for a daughter to do Hajj and give charity on behalf of her deceased mother, knowing that the mother did not pray when she was alive?.
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Check below answers in case you are looking for other related questions:
Fard (obligatory) prayer takes precedence over nafl (supererogatory) prayer, carries more weight, and it is greater in reward
He does not pray and they are afraid that he is working as a pimp

Answer:
Praise be to Allaah.

The one who does not pray because he denies that it is obligatory is a kaafir according to scholarly consensus. The one who does not pray out of negligence and laziness is a kaafir according to the more correct of the two scholarly opinions, because the Prophet (peace and blessings of Allaah be upon him) said: “The covenant that stands between us and them is prayer; whoever gives it up is a kaafir.” And there is other evidence to that effect from the Qur’aan and Sunnah. Based on that, it is not permissible to do Hajj or give charity on behalf of someone who has died and did not pray, just as it is not permissible to do Hajj and give charity on behalf of any other kaafir. 

And Allaah is the Source of strength. May Allaah send blessings and peace upon our Prophet Muhammad and his family and companions. End quote. 

Standing Committee for Academic Research and Issuing Fatwas 

Shaykh ‘Abd al-‘Azeez ibn Baaz, Shaykh ‘Abd al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allaah ibn Qa’ood. 

Whatever written of Truth and benefit is only due to Allah's Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.
Your brother and well wisher in Islam

Related Answers:
Fasting is not accepted if one doesn’t pray
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He does not pray for one or two days or more
Fard (obligatory) prayer takes precedence over nafl (supererogatory) prayer, carries more weight, and it is greater in reward
He does not pray and they are afraid that he is working as a pimp

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